Home » Search results for 'HBD and Sports'

Search Results for: HBD and Sports


HBD and Sports: Basketball

1600 words

In the past, I have written on the subject of HBD and sports (it is a main subject of this blog). I have covered baseball, football, running, bodybuilding, and strength over many articles. Though, I have not covered basketball yet. Black Americans comprised 74.4 percent of the NBA, compared to 19.1 percent of whites (TIDES, 2017). Why do blacks dominate the racial composition of baskeball? Height is strongly related to success in basketball, though whites and blacks are around the same height, with blacks being slightly shorter (blacks being 69.4 inches compared to whites who were 69.8 inches; CDC, 2012). So, why do blacks dominate basketball?

Basketball success isn’t predicated so much on height, rather, limb length plays more of a factor in basketball success. Blacks have longer limbs than whites (Wagner and Heyward, 2000Bejan, Jones, and Charles, 2010). The average adult man has an arm span about 2.1 inches greater than his height (Nwosu and Lee, 2008), while Monson, Brasil, and Hlusko (2018) state that taller basketball players had a greater height-to-wingspan ratio and they were, therefore, more successful. The Bleacher Report reports that:

The average NBA Player’s wingspan differential came out at 4.3 percent, so anything above that is going to be reasonably advantageous.

So, more successful basketball players have a longer arm span compared to their height, which makes them more successful in the sport. Blacks have longer limbs than whites, even though they are on average the same height. Thus, one reason why blacks are more successful than whites at basketball is due to their somatotype—their long limbs, specifically,

David Epstein (2014: 129) writes in The Sports Gene:

Based on data from the NBA and NBA predraft combines (using only true, shoes-off measurements of players), the Census Bureaum abd the Centers for Disease Control’s National Center for Health Statistics, there is such a premium on extra height for NBA that the probability of an American man between the ages of twenty and forty being a current NBA player rises nearly a full order of magnitude with every two-inch increase in height starting at six feet. For a man between six feet and 6’2”, the chance of his currently being in the NBA is five in a million. At 6’2” to 6’4”, that increases to twenty in a million. For a man between 6’10” and seven feet tall, it rises to thirty-two thousand in a million, or 3.2 percent. An American man who is seven feet tall is such a rarity that the CDC does not even list a height percentile at that stature. But the NBA measurements combined with the curve formed by the CDC’s data suggest that of American men ages twenty to forty who stand seven feet tall, a startling 17 percent of them are in the NBA right now.* Find six honest seven-footers, and one will be in the NBA.

* Many of the men who NBA rosters claim are seven feet tall prove to be an inch or even two inches shorter when measured at the combine with their shows off. Shaquille O’Neal, however, is a true 7’1” with his shoes off.

And on page 132 he writes:

The average arm-span-to-height ratio of an NBA player is 1.063. (For medical context, a ratio greater than 1.05 is one of the traditonal diagnostic criteria for Marfan syndrome, the disorder of the body’s connective tissues that results in elongated limbs.) An average-height NBA player, one who is about 6’7”, has a wingspan of seven feet.

So we can clearly see that NBA players, on average, are freaks of nature when it comes to limb length, having freakish arm length proportions which is conducive to success in basketball.

Why are long limbs so conducive to basketball success? I can think of a few reasons.

(1) The taller one is and the longer one’s limbs are the less likely they are to have a blocked shot.

(2) The taller one is and the longer one’s limbs are is advantageous when performing a lay-up.

(3) The taller one is and the longer one’s limbs are means they can battle for rebounds at better than a shorter man with shorter limbs.

Epstein (2014: 136) also states that the predraft data shows that the average white NBA player is 6’7.5” with a wingspan of 6’10” while the average black NBA player is 6’5.5” with an average wingspan of 6’11”—meaning that blacks were shorter but “longer.” What this means is that blacks don’t play at “their height”—they play as if they were taller due to their wingspan.

Such limb length differences are a function of climate. Shorter, stockier bodies (i.e., an endomorphic somatotype) is conducive to life in colder climes, whereas longer, more narrowbodies (ecto-meso) are conducive to life in the tropics. Endomorphic somas are conducive to  life in colder climes because there is less surface area to keep warm—and this is seen by looking at those whose ancestors evolved in cold climes (Asians, Inuits)—shorter, more compact bodies retain more heat. Conversely, ecto-meso somas are conducive to life in hotter, more tropical climes since this type of body dissipates heat more efficiently than endo somas (Lieberman, 2015). So, blacks are more likely to have the soma conducive to basketball success due to where their ancestors evolved.

So, now we have discussed the facts that height and limb length are conducive to success in basketball. Although blacks and whites in America are the same height, they have vastly different average limb lengths, as numerous studies attest to. These average differences in limb length are how and why blacks succeed far better than whites in the NBA.

Athleticism is irreducible to biology (Lewis, 2004), as has been argued in the past. However, that does not mean that there are NOT traits that are conducive to success in basketball and other sports. Both height and limb length are related: more than likely, the taller one is, the longer their limbs are relative to their height. This is what we see in elite NBA players. Height, will, altitude, and myriad other factors combine to create the elite NBA phenotype; height seems to be a necessary—not sufficient—condition for basketball success (since one can be successful at basketball without the freakish heights of the average player). Though, as Epstein wrote in his book, both height and limb length are conducive to success in basketball, and it just so happens that blacks have longer limbs than whites which of course translates over to their domination in basketball.

Contrary to popular belief, though, players coming from broken homes and an impoverished life are not the norm. As Dubrow and Adams (2010) write:

We find that, after accounting for methodological problems common in newspaper data, most NBA players come from relatively advantaged social origins and African Americans from disadvantaged social origins have lower odds of being in the NBA than African American and white players from relatively advantaged origins.

Sports writer Peter Keating writes that:

[Dubrow and Adams] found that among African-Americans, a child from a low-income family has 37 percent lower odds of making the NBA than a child from a middle- or upper-income family. Poor white athletes are 75 percent less likely to become NBA players than middle-class or well-off whites. Further, a black athlete from a family without two parents is 18 percent less likely to play in the NBA than a black athlete raised by two parents, while a white athlete from a non-two-parent family has 33 percent lower odds of making the pros. As Dubrow and Adams put it, “The intersection of race, class and family structure background presents unequal pathways into the league.”

(McSweeney, 2008 also has a nice review of the matter.)

Turner et al (2015) state that black males were more likely to play basketball than whites males. Higher-income boys were more likely to play baseball, whereas lower-income boys were more likely to play basketball. Though, it seems that when it comes to elite basketball success, players seem to come from higher-income homes.

Therefore, to succeed in basketball, one needs height and long limbs to succeed in basketball. Contrary to popular belief, it is less likely for an NBA player to come from a low-income family—they come from middle-class families the most. Indeed, those who come from lower-income families, even if they have the skill, most likely won’t have the money to develop the talent they have. Though there are some analyses which point to basketball being played by lower-income children—and I have no reason to disagree with them—when it comes to professional play, both blacks and whites are less likely to become NBA players if they grew up in poverty.

The limb length differences between blacks and whites which are conducive to sport success are a function of the climate that their ancestors evolved in. Now, although athleticism is irreducible to biology (because biological and cultural factors interact to create the elite athletic phenotype), that does not mean that there are no traits conducive to sporting success. Quite the opposite: A taller player would more often than not beat a shorter player; when it comes to players with the same height and different limb lengths, the one with the longer limbs will stand a better chance at beating the one with shorter limbs. Blacks and whites have different limb lengths, and this explains how and why blacks are more successful at basketball than whites. Cultural and biological factors combine in order to cause what one is good at.

Basketball is huge in the black community (due in part to people gravitating toward what they are good at), and due to this, since blacks have an advantage right out of the gate, they will gravitate more toward the sport and, therefore, height and limb length is a huge reason why black dominate at this sport.


HBD and Sports: Baseball and Reaction Time

2050 words

If you’ve ever played baseball, then you have first-hand experience on what it takes to play the game, one of the major abilities you need is a quick reaction time. Baseball players are in the upper echelons in regards to pitch recognition and ability to process information (Clark et al, 2012).

Some people, however, believe that there is an ‘IQ cutoff’ in regards to baseball; since general intelligence is supposedly correlated with reaction time (RT), then those with higher RTs must have higher intelligence and vice-versa. However, this trait—in a baseball context—is trainable to an extent. To those that would claim that IQ would be a meaningful metric in baseball I pose two question: would higher IQ teams, on average, beat lower IQ teams and would higher IQ people have better batting averages (BAs) than lower IQ people? This, I doubt, because as I will cover, these variables are trainable and therefore talking about reaction time in the MLB in regards to intelligence is useless.

Meden et al (2012) tested athlete and non-athlete college students on visual reaction time (VRT). They tested the athletes’ VRT once, while they tested the non-athletes VRT two times a week for a 3 week period totaling 6 tests. Men ended up having higher VRTs in comparison to women, and athletes had better VRTs than non-athletes. So therefore, this study proves that VRT is a trainable variable. If VRT can be improved with training, then hitting and fielding can also be trained as well.

Reaction time training is the communication between the brain, musculoskeletal system and spinal cord, which includes both physical and cognitive training. So since VRT can be trained, then it makes logical sense that Major League hitting and fielding can be trained as well.

David Epstein, author of The Sports Gene says that he has a faster reaction time than Albert Pujols:

One of the big surprises for me was that pro athletes, particularly in baseball, don’t have faster reflexes on average than normal people do. I tested faster than Albert Pujols on a visual reaction test. He only finished in the 66thpercentile compared to a bunch of college students.

It’s not a superior RT that baseball players have in comparison to the normal population, says Epstein, but “learned perceptual skills that the MLB players don’t know they learned.” Major League baseball players do have average reaction times (Epstein, 2013: 1) but a far superior visual acuity. Most pro-baseball players had visual acuity of 20/13, with some players having 20/11; the theoretical best visual acuity that is possible is 20/8 (Clark et al, 2012). Laby, Kirschen, and Abbatine show that 81 percent of the 1500 Major and Minor League Mets and Dodgers players had visual acuities of 20/15 or better, along with 2 percent of players having a visual acuity of 20/9.2. Baseball players average a 20/13 visual acuity with the best eyesight humanly possible being 20/8. (Laby et al, 1996).

So it’s not faster RT that baseball players have, but a better visual acuity—on average—in comparison to the general population. Visual reaction time is a highly trainable variable, and so since MLB players have countless hours of practice, they will, of course, be superior on that variable.

Clark et al (2012) showed that high-performance vision training can be performed at the beginning of the season and maintained throughout the season to improve batting parameters. They also state that visual training programs can help hitters, since the eyes account for 80 percent of the information taken into the brain. Reichow, Garchow, and Baird (2011) conclude that a “superior ability to recognize pitches presented via tachistoscope may correlate with a higher skill level in batting.” Clark et al (2012) posit that their training program will help batters to better recognize the spot of the ball and the pitcher’s finger position in order to better identify different pitches. Clark et al (2012) conclude:

The University of Cincinnati baseball team, coaches and vision performance team have concluded that our vision training program had positive benefits in the offensive game including batting and may be providing improved play on defense as well. Vision training is becoming part of out pre-season and in season conditioning program as well as for warmups.

Classe et al (1997) showed that VRT was related to batting, but not fielding or pitching skill. Further, there was no statistically significant difference observed between VRT and age, race or fielding. Therefore, we can say that VRT has no statistical difference on race and does not contribute to any racial differences in baseball.

Baseball and basketball athletes had faster RTs than non-athletes (Nakamoto and Mori, 2008). The Go/NoGo response that is typical of athletes is most certainly trainable. Kida et al (2005) showed that intensive practice improved the Go/NoGo reaction time, but not simple reaction time. Kida et al (2005: 263-264) conclude that simple reaction time is not an accurate indicator of experience, performance or success in sports; Go/NoGo can be improved by practice and is not innate (but simple reaction time was not altered) and the Go/NoGo reaction time can be “theoretically shortened toward a certain value determined by the simple reaction time proper to each individual.

In baseball players in comparison to a control group, readiness potential was significantly shorter for the baseball players (Park, Fairweather, and Donaldson, 2015).  Hand-eye coordination, however, had no effect on earned run average (ERA) or batting average in a sample of 410 Major and Minor League members of the LA Dodgers (Laby et al, 1997).

So now we know that VRT can be trained, VRT shows no significant racial differences, and that Go/NoGo RT can be improved by practice. Now a question I will tackle is: can RT tell us anything about success in baseball and is RT related to intelligence/IQ?

Khodadi et al (2014) conclude that “The relationship between reaction time and IQ is too complicated and revealing a significant correlation depends on various variables (e.g. methodology, data analysis, instrument etc.).” So since the relationship is too complicated between the two variables, mostly due to methodology and the instrument used, RT is not a good correlate of IQ. It can, furthermore, be trained (Dye, Green, and Bavelier, 2012).

In the book A Question of Intelligence, journalist Dan Seligman writes:

In response, Jensen made two points: (1) The skills I was describing involve a lot more than just reaction time, they also depended heavily on physcial coordination and endless practice. (2) It was, however, undoubtedly true that there was some IQ requirement-Jensen guessed it might be around 85- below which you could never recruit for major league baseball. (About one-sixth of Americans fall below 85).

I don’t know where Jensen grabbed the ‘IQ requirement’ for baseball, which he claims to be around 85 (which is at the black average in America). This quote, however, proves my point that there is way more than RT involved in hitting a baseball, especially a Major League fastball:

Hitting a baseball traveling at 100 mph is often considered one of the most difficult tasks in all of sports. After all, if you hit the ball only 30% of the time, baseball teams will pay you millions of dollars to play for them. Pitches traveling at 100 mph take just 400 ms to travel from the pitcher to the hitter. Since the typical reaction time is 200 ms, and it takes 100 ms to swing the bat, this leaves just 100 ms of observation time on which the hitter can base his swing.

This lends more credence to the claim that hitting a baseball is more than just quick reflexes; considerable training can be done to learn certain cues that certain pitchers use; for instance, like identifying different pitches a particular pitcher does with certain arm motions coming out of the stretch. This, as shown above in the Epstein quote, is most definitely a trainable variable.

Babe Ruth, for instance, had better hand-eye coordination than 98.8 percent of the population. Though that wasn’t why he was one of the greatest hitters of all time; it’s because he mastered all of the other variables in regards to hitting, which are learnable and not innate.

Witt and Proffitt (2005) showed that the apparent ball size is correlated with batting average, that is, the better batters fared at the plate, the bigger they perceived the ball to be so they had an easier time hitting it. Hitting has much less to do with reaction time and much more to do with prediction, as well as the pitching style of the pitcher, his pitching repertoire, and numerous other factors.

It takes a 90-95 mph fast ball about 400 milliseconds to reach home plate. It takes the brain 100 milliseconds to process the image that the eyes are taking in, 150 milliseconds to swing and 25 milliseconds for his brain to send a signal to his body to swing. This leaves the hitter with 125 milliseconds left to hit the incoming fastball. Clearly, there is more to hitting than reaction time, especially when all of these variables are in play. Players have .17 seconds to decide whether or not to hit a pitch and where to place their bat (Clark et al, 2012)

A so-called ‘IQ cutoff’ for baseball does exist, but only because IQs lower than 85 (once you begin to hit the 70s range, especially the lower levels) indicate developmental disorders. Further, the 85-115 IQ range encompasses 68 percent of the population. However, RT is not even one of the most important factors in hitting; numerous other (trainable) variables influence fastball hitting, and all of the best players in the world employ these strategies. People may assume that since intelligence and RT are (supposedly) linked, that baseball players, since they (supposedly) have quick RTs. Nevertheless, if quick RTs were correlated with baseball profienciency—namely, in hitting, then why are Asians 1.2 percent of the players in the MLB? Maybe because RT doesn’t really have anything to do with hitting proficiency and other variables have more to do with it.

People may assume that since intelligence and RT are (supposedly) linked, that baseball players, since they (supposedly) have quick RTs then they must be intelligent and therefore there must be an IQ cutoff because intelligence/g and RT supposedly correlate. However, I’ve shown 2 things: 1) RT isn’t too important to hitting at an elite level and 2) more important skills can be acquired in hitting fastballs, most notable, in my opinion, is pitch verification and the arm location of the pitcher. The Go/NoGo RT can also be trained and is, arguably, one of the most important training systems for elite hitting. Clearly, elite hitting is predicated on way more than just a quick RT; and most of the variables that are involved in elite hitting are most definitely trainable, as reviewed in this article.

People, clearly, make unfounded claims without having any experience in something. It’s easy to make claims about something when you’re just looking at numbers and attempting to draw conclusions based on data. But it’s a whole other ballgame (pun intended) when you’re up at the plate yourself or coaching someone on how to hit or play in the infield. These baseless claims would be avoided a lot more if only the people who make these claims had any actual athletic experience. If so, they would know of the constant repetition that goes into hitting and fielding, the monotonous drills you have to do everyday until your muscle memory is trained to flawlessly—without even thinking about it—throw a ball from shortstop to first base.

Practice, especially Major League practice, is pivotal to elite hitting; only with elite practice can a player learn how to spot the ball and the pitcher’s finger position to quickly identify the pitch type in order to decide if he wants to swing or not. In conclusion, a whole slew of cognitive/psychological abilities are involved in the upper echelons of elite baseball, however a good majority of the traits needed to succeed in baseball are trainable, and RT has little to do with elite hitting.

(When I get time I’m going to do a similar analysis like what I wrote about in the article on my possible retraction of my HBD and baseball article. Blacks dominate in all categories that matter, this holds for non-Hispanic whites and blacks as well as Hispanic blacks and whites, read more here. Nevertheless, I may look at the years 1997-2017 and see if anything has changed from the analysis done in the late 80s. Any commentary on that matter is more than welcome.)

HBD and Sports: Football

2000 words

In my first post in this series, I talked about HBD and Baseball. With the Super Bowl being tomorrow, I figured I’d talk about HBD and how it fits in to football.

According to TIDES (The Institute for Diversity and Ethics in Sports), in 2014, the racial mix of the NFL was 68.7 percent black, 28.6 percent white, “Latinos” at .7 percent, Asian at 1.1 percent and Pacific Islanders at .9 percent. International players made up the last 1 percent.

That’s basically the reverse ethnicity for baseball which is 75 percent white, 23 percent black and 2 percent Asian in 2014. As you see, when we start talking about sports with more athleticism involved, the number of blacks increases. With a more timing-based sport, such as baseball, they will be a lower portion of the racial mix in baseball, seeing as timing based (reaction time) sports are geared more towards people with high IQs, seeing as there is a high correlation between IQ and reaction time.

Blacks are over-represented in the NFL due to evolutionary selection pressures in the sub-Saharan desert. Africans have longer limbs, can sprint for longer distances and have higher stamina. This works out with what they had to do in Sub-Saharan Africa. They had to chase food, chuck spears etc.

Those longer limbs help them get them more space from defenders, allowing them to catch the ball at the highest point. Evolution also gave an advantage for jumping as well.


The above chart gives a racial breakdown of positions by race in the NFL, and what I will be referencing for the rest of this article.

The Center position (the one who snaps the ball to the QB) is majority white. That position requires the use of type I muscle fibers. Those fibers, which use oxygen to fire, which takes longer to get going, can go for a longer period of time before tiring out. The force per contraction of the muscle is spread out over time. So because those fibers take longer to get going, the white Center has a physiological advantage, on average, over black Centers. Their muscle fiber typing helps them

Conversely, for the speed positions (RB, WR, somewhat CB), those fibers fire without oxygen (so they fire anaerobically), they fire extremely quickly, and also tire out just as fast as they fire off. Because the muscle generates so much force in such a small period of time, this is better for those positions that take near pure speed, agility and quickness (there is a difference). Agility is defined as the ability to be quick and graceful. Speed is defined as the rate at which someone or something is able to move or operate. Quickness is defined as a high rate of movement or performance.

This is why CB is majority black. It takes an extreme amount of athleticism to be able to do what CBs do. They need to be quick off the snap, stay with the WR and then be able to react quickly for an interception or a tackle.

DE is another position that is majority black. That position is used to pressure the QB into throwing the ball before he’s ready. DEs also have longer limbs, which is helpful when attempting to maneuver around the Tackle to get to the QB. This is another position where those fast twitch muscle fibers come in handy.

DTs need to be at least 260 pounds. They need to be quick off the ball and have good vision to see above and around the Offensive Tackles. This is where the height advantage of blacks is again useful. Their longer limbs also has theme excel at this position.

Fullbacks are equally white and black. You need to be a big body to be able to block, you don’t need to be too quick, but be able to exert force for a small amount of time so you can block the defender who’s attempting to tackle the RB or another player who has the ball.

Guards, again are equally black and white. The same intangibles that hold for Centers also hold true for guards. All players on the offensive line are pretty damn big, long limbs again is a positive trait for those positions, with blacks obviously having the advantage there. But as I noted with Centers, they need to be able to hold a block, so the slow twitch muscle fibers of the white players help them there. The type II fibers of blacks also help on the offensive line, as their muscle fibers allow them to exert more force in a shorter amount of time, pushing back the defender so the one with the ball has a lane to get through.

Kickers are all white. This makes sense. Again, as this whole post is basically about, this comes down to differing amounts of type I muscle fibers between the races. Punters are needed to kick a ball, at times over 55 yards. This is where those slow twitch muscle fibers come in handy, and the reason why there are no black kickers.

Linebackers are majority black. They are called “the QBs of the defense”. You can see this where the MLB (the one who is the “QB” of the defense) directing calls and sometimes calling audibles. It doesn’t give a breakdown of Middle and Outside linebackers by race, but I’d assume that more MLBs are white, and more OLBs are black. The OLBs use their speed and agility to attempt a sack on the QB while the MLB needs to know where the ball is at all times.

Long snappers are all white. The long snapper is a Center who snaps the ball more than 15 yards during punts and 7 to 8 yards during field goals and extra point attempts.

The NT position is all black. A NT is the middle man on the defensive line in a 3-4 defense (3 down linemen, 4 linebackers as opposed to a 4-3 defense with 4 down linemen and 3 linebackers). The position is called “nose tackle” because the linemen lines up over the nose of the ball. The NT is usually the biggest player on the defense and pushes through the line to get to the QB to put pressure on him.

The same things that apply to punters, also apply to kickers.

Just what I was waiting for. QB. 65 white QBs compared to 14 black QBs. Why? Because the QB is, on average, the most intelligent player in the offense. He needs to remember calls, plays, audibles, needs to be calm under pressure and be analytical in where the ball is placed when there is a defender right on top of his receiver. Most all of the good QBs in the NFL are white. Those QBs in the NFL who are black, mostly are running QBs. That gets one dimensional over time, and the defense can better cue in to what the QB is doing so it gets stopped more often. The QB position is a proxy, IMO, for racial differences in intelligence because intelligence is a pretty big factor in regards to the QB position. To be able to think slightly into the future on where you need to throw the ball so your receiver can get to the ball away from the defender, to changing plays when you see a defensive alignment that doesn’t look right with the offensive alignment you already have called, the QB needs to be a highly intelligent person. Most black QBs are only liked because they make the game more exciting by 1) keeping the defense on their toes and 2) they break off huge runs when all players are covered and there is no one to tackle the QB.

Running backs are majority black. They need agility, quickness and speed to be able to shake defenders. Long limbs also help with covering more ground per step. This is why those players, such as Chris Johnson, had a 40 time of 4.24 seconds. Those with the fast twitch fibers are West African descended while those blacks with slow twitch fibers are East African descended. Most power backs are white in the NFL, which again comes back to slow twitch muscle fibers. They are usually stronger than those speed backs.

Safetys are majority black. As is the case with CB, safetys need the athleticism, long limbs, speed, quickness, agility and vision to be able to anticipate where the ball is, and then they need to be able to have the speed and agility to get to where the ball is on time, before a member of the opposing team has a chance to get to the ball.

Tackles, again are basically even, the same things apply for Guards and Centers.

Tight end is another position that’s about even. You need a bigger body to be able to position yourself better than the defender that’s covering you. Along with that bigger body comes longer limbs to be able to catch the ball at its highest point so the defender can’t tip or intercept the ball. You have some tightends, such as Vernon Davis, who are tall and have good speed. But he’s a rarity in tight ends in the NFL. The tightend is usually another blocker for the QB, so he needs the slow twitch muscle fibers. As I have alluded to above, the slow twitch muscle fibers have tightends able to hold blocks for a longer amount of time.

Finally, wide receiver is majority black. The same things as the other skill positions (RB, TE, QB), you need to have a big body to catch the ball at its highest point. They also need speed, quickness and agility to be able to get separation from the defender. You have some wide receivers who are short, but extremely fast like Washington Redskins receiver Desean Jackson, with a 4.35 40 time.

In this study by Wagner and Heyward, they note that biological differences exist between blacks and whites. They reviewed the literature on the differences between blacks and whites in fat free body mass (water, mineral and protein) fat patterning and body dimensions and proportions. Blacks, in general, have greater bone mineral density and body protein content than do whites, resulting in lower fat-free bone density. They also note racial differences in the differences of subcutaneous body fat, which is the body fat that’s just below the skin, as opposed to visceral body fat which is found in the peritoneal cavity, which can be measured with calipers to give a rough estimate of total body fat adiposity. The conclusion reached in the study was that differences in FFB (fat free body) was statistically significant between blacks and whites. They also have a greater BMC (bone mineral content) and BMD (bone mineral density) than do whites. They also argue that for a given BMI (body mass index), blacks might have less adiposity because they tend to be more mesomorphic. Researchers push for the development of racial-specific equations to better see differences in FFB.

The two races also differ in the width of hips, which less wide hips are better for more speed production in comparison to whites who have wider hips on average.

Differences in body type (somatype) are also linked to race. As I noted above, blacks skew more towards mesomorphy. Whites do as well, but it’s more prevalent in blacks. Endomorphs skew more towards Asians and whites. Ectomorphs skew more towards Asian populations.

In conclusion, football proves HBD right as well. The racial mix of differing positions, as well as strengths and weaknesses with them, show the reasons for certain races performing better than other races in certain positions. Innate physiological differences in blacks and whites show why there are racial disparities in all sports. Because of lower average fat mass in blacks, this allows for more speed because there is less body fat to weigh them down, on average. Somatypes also, roughly correlate with race.

We know and accept physical differences between the races that lead to over or underrepresentation in sports, but once someone brings up intelligence differences, you get shunned. So we all have the ability to be as intelligent as any other individual? Blacks have this innate advantage to be good at sports, but whites and Asians don’t get to say they are more intelligent on average?

Football is one of the 4 major sports in America that proves HBD.

HBD and Sports: Baseball

1350 words

Racial differences in sports also prove HBD. The differences are extremely clear to the naked eye, but there are many physiological differences between races that lead to disparities of one being over-represented over another race. I will touch on the three main races (Europeans, Asians and Africans), what they excel in and what they are below average in. Sports, as does academic achievement, prove HBD right. Sports prove innate athletic differences, whereas academic achievement proves innate differences in the brain, as well as intelligence. This is on average of course.

The word ‘sport’ is defined as an athletic activity requiring skill or physical ability, often of competitive nature. The sports I will touch on are baseball, basketball, soccer, football, weightlifting, bodybuilding, chess, gaming and hockey.

Baseball is predominantly white (MLB’s 2015 Racial/Gender Report Card), at 58.8 percent white (down from 60.9 in 2014), 8.3 percent black (up from 8.2 percent in 2014), 29.3 percent ‘Latino’ (up from 28.4 percent in 2014), and 1.2 percent Asian (down from 2 percent in 2014). Baseball is actually one of the only sports in America to be close enough to the ethnic mix of the country. According to the SABR (Society for American Baseball Research), the highest rate for black players in the MLB was in 1981 at 18.7 percent.

Before getting in to why the disparity is that large, I need to touch on ‘Latinos’ in baseball.

According to, in 2014, 224 out of 853  players (750 active 25-man roster players and 103 disabled or restricted Major League players) were foreign-born, accounting for 26.3 percent of the players that year. Highest is the Dominican Republic with 83 players, followed by Venezuela with 59 players, Cuba with 19, Puerto Rico with 11, Mexico with 9, Colombia with 4, Panama with 4 and Nicaragua with 3. That makes 192 ‘Latino’ baseball players.

This article talks about how ‘black Latinos’ don’t get treated as black, but as ‘Latino’, when they are racially black (I will show some notable examples below). People like to think that it’s its own separate racial category when that’s not true at all.

Using 2014’s numbers, 520 players were white, 72 were black, 243 were ‘Latinos’, and 18 were Asians. We know that all ‘Latinos’ aren’t black, so using 2014’s numbers by country I will try to estimate the number of black ‘Latino’ players to try to get a real look at the racial breakdown in the MLB.

For brevity, I will just add each country up as what the majority mix of that particular country is. So, adding to the 72 black players I will add 83 from D.R., Cuba with 19, I’ll split P.R. with 5. Venezuela has a mix of blacks, whites and mulattoes, so I will just say 25 percent are black. That’s 15. Adding those up you get 194 black players. Keep in mind, a conservative estimate. So that makes the MLB about 23 percent black (this is only for those from foreign-born countries, I may make a comprehensive list one day if I feel up to it about this).

(I will just group mestizos as white for brevity to only have 3 categories.) So with that being said, 641 white players, 194 black players, and 18 Asian players. So with my guesstimate, baseball is 75 percent white, 23 percent black and 2 percent Asian in 2014.

Why the huge disparity? Simple. Baseball, at its core, is about reaction time. To quote Rushton and Jensen from their magnum opus Thirty Years of Research on Race Differences in Cognitive Ability (pg 244):

Reaction time is one of the simplest culture-free cognitive measures. Most reaction time tasks are so easy that 9- to 12-year-old children can perform them in less than 1 s. But even on these very simple tests, children with higher IQ scores perform faster than do children with lower scores, perhaps because reaction time measures the neurophysiological efficiency of the brain’s capacity to process information accurately—the same ability measured by intelligence tests (Deary, 2000; Jensen, 1998b). Children are not trained to perform well on reaction time tasks (as they are on certain paper-and-pencil tests), so the advantage of those with higher IQ scores on these tasks cannot arise from practice, familiarity, education, or training.

And from pg 245:

The same pattern of average scores on these and other reaction time tasks (i.e., East Asians faster than Whites faster than Blacks) is found within the United States. Jensen (1993) and Jensen and Whang (1994) examined the time taken by over 400 schoolchildren ages 9 to 12 years old in California to retrieve overlearned addition, subtraction, or multiplication of single digit numbers (from 1 to 9) from long-term memory. All of the children had perfect scores on paper-andpencil tests of this knowledge, which was then reassessed using the Math Verification Test. The response times significantly correlated (negatively) with Raven Matrices scores, whereas movement times have a near-zero correlation. The average reaction times for the three racial groups differ significantly (see Figure 2). They cannot be explained by the groups’ differences in motivation because the East Asian children averaged a shorter response time but a longer movement time than did the Black children.

Those with higher IQs average faster times on the simple RT, choice RT and odd-man-out RT. They follow Rushton’s Rule of Three, in which blacks will be at the bottom, whites in the middle and Asians at the top.

In this articleMind Games: What Makes a Great Baseball Player Great, they say that studies done by Columbia University on Babe Ruth while he was playing showed that he could react to visual and sound cues better than the normal population, as well as having better hand-eye coordination than 98.8 percent of the population. A great proportion of MLB players have 20/20 vision or better. Within higher-skilled players, even then there are huge differences in reaction time (IQ differences). Hitters also have to predict where the ball will be, all within a 4/10ths of a second. This infographic explains it well. So you need an extremely high reaction time to hit a fastball coming at you at 95 miles per hour. All of this proves that, on average, baseball players have high IQs because of a lot of the things associated with baseball, also correlate highly with IQ.

Personality also is a factor. According to the previously linked article, with the example of Darryl Strawberry and Billy Beane, Strawberry handled the pressure well, while Beane folded under pressure. Seems this has to do with extroversion and introversion. Strawberry says that self-confidence and mental toughness come in to play because they fail 66 percent of the time they come up to hit.

Athletic ability is also important. The top two record holders for stolen bases in the MLB are blacks. Has to do with fast twitch muscle fibers (muscle fibers that exert force faster, but tire out more quickly than slow twitch). So you can see how natural fast twitch muscle fibers help blacks on the field, as well as the base pads, in baseball.

To touch on a previous point, even in the upper end of hitters (the elite ones), there are still marked differences in reaction time (IQ). That makes sense, seeing as I alluded to before that it takes 4/10ths of a second for a 95 MPH fastball to reach home plate.

Why the low rate for Asians? Well, natural athletic ability for one. The second reason is myopia. Those with myopia do have a higher IQ on average (as the correlation is .25), but those that are nearsighted are often late in their reactions to higher speed pitches.  For something anecdotal, I’ve noticed that most Asians are pitchers, either starters of relievers. This article talks about the critical vision skills that pitchers need, and all though Asians are only 2 percent of the MLB, their high visio-spatial ability, along with high reaction times, they are able to succeed as good pitchers in the MLB.

Outfielders are generally fast and quick. Blacks round out a good amount of outfielders, whereas whites round out catcher, as well as a majority of the infield, due to a lot of line-drive hits coming at them, which the player needs high reaction times to be able to catch/field the ball.

Sports prove HBD, just like academic/monetary achievement. Intelligence, as well as physical differences, are pretty much innate. They show in all facets of life. Even though they are obvious to most, no one ever speaks out on it.

Muscle Fiber Typing, HBD, and Sports

1850 words

With the Olympics currently happening, I figured I’d talk about muscle fiber typing and how it plays a factor in who wins what competition. First I’ll go through both fiber typings and what they mean for each sport. Then I will go through some of the most well-known sports and show how and why certain races dominate in different sports.

Muscle fiber typing

There are two types of muscle fibers: Type I fibers (slow twitch) and Type II fibers (fast twitch). Each fiber fires off through different pathways, whether they be anaerobic or aerobic. The body uses two types of energy systems, aerobic or anaerobic, which then generate Adenosine Triphosphate, better known as ATP, which causes the muscles to contract. Depending on the type of fibers an individual has dictates which pathway muscles use to contract which then, ultimately, dictate if there is high muscular endurance or if the fibers will fire off faster for more speed.

Type I fibers lead to more strength and muscular endurance as they are slow to fire off, while Type II fibers fire quicker and tire faster. Slow twitch fibers use oxygen more efficiently, while fast twitch fibers do not burn oxygen to create energy. Slow twitch muscles delay firing which is why the endurance is so high in individuals with these fibers whereas for those with fast twitch fibers have their muscles fire more explosively. Slow twitch fibers don’t tire as easily while fast twitch fibers tire quickly. This is why West African blacks and their descendants dominate in sprinting and other competitions where fast twitch muscle fibers dominate in comparison to slow twitch.

Usain Bolt, who just won the 100m dash the other day, has fast twitch fibers (Type II) due to a gene called ACTN3 which is associated with elite athletic performance. West African blacks and their descendants have this gene. For example, 70 percent of Jamaicans have the ACTN3 gene, and this gene is why Usain Bolt is the world’s fastest man.

Though at the same time, West Africans and their descendants suffer in competitions where muscular endurance is needed (swimming is one of them). Caucasians Asians and East Africans have more slow twitch fibers (Type I fibers) which allows them to dominate in competitions where endurance is needed (weightlifting, Strong Man, distance running, swimming).

There are physiological differences found in the winners of these competitions, and like most things, there is a racial basis to them.


As noted above, West Africans and their descendants dominate competitions in which their muscle fibers are best put to use (sprinting, football, basketball, etc) while they suffer in competitions in which Caucasians and Asians dominate in which muscular endurance is needed (weightlifting, powerlifting, distance running).

World’s Strongest Man

Muscle fiber typings play a major part in the winners of these competitions as does limb length. Generally, the winners of the World’s Strongest Man (WSM) are more stocky and have shorter limbs which translates into more power generated since the distance is shorter.

A white man has won the WSM competition every year since its inception. It’s always a Northern or Easter European who wins these competitions. The Russians and Slavs are known for their crazy squat programs, and muscle fiber typing is the reason why. They are able to generate more power than those with fast twitch fibers which translates into domination in strength-based competitions.

The same thing is noticed in powerlifting. Caucasians and Asians dominate. I’ve seen some incredibly strong East Asian powerlifters, and the reason is they are shorter and stockier with shorter limbs. More power is able to be generated with the shorter distance and Type II fibers which allow these populations to excel in these types of competitions.

I hypothesize that just like West Africans and their descendants consistently win sprinting competitions due to their genes and fiber typing, this is the same reason why Europeans consistently win WSM. Though, PumpkinPerson thinks differently about this.

PP believes that since Africans have higher testosterone, then they, therefore, should dominate in these types of competitions. His reasoning is based on Rushton’s Rule of Three, which all though it holds well for a wide variety of variables, it doesn’t hold with more complex traits such as muscle fiber typing.

PP cites a study stating that blacks out benched whites in the beginning and end of the study. However, it seems this is anomalous. The researchers say this is the only study looking at this, and from what I can tell, they didn’t ask about dietary and or exercise habits. They also say that blacks were heavier in BMI at the onset, but not in the follow-up.

I’d like to see another study like this before any conclusions are drawn. Because what I see in actual powerlifting competitions from people who go above and beyond their genetic potential when everyone is using, Caucasians (whites, MENA people) and East Asians are consistently always stronger than blacks. From what we see from actual competitions, Caucasians and Asians dominate these competitions. Africans are really nowhere to be found. In fact, Kenya is the only sub-Saharan African country to place in the top 3 in the WSM, which strengthens my theory on muscle fiber typing and strength-based competitions since they have slow twitch fibers.

PP then writes another article saying that from 1938 to 1953 the WSM was a black man named John Henry Davis. He was known as the WSM from those years, but as we know, exceptions don’t prove rules.

Mark Henry is a better example. Genetic freak of nature. World record total in squat, bench and deadlift; he was a squatting 600 pounds as a freshman; as a teenager, he had the 8th best total regardless of age group.

He’s a genetic freak of nature. He’s way stronger than the guy you cited. Mark Henry is one of the strongest people to ever live. He is a freak of nature. I can’t emphasize that enough.


West Africans and their descendants excel at sports where their muscle fiber typing is put to good use. The ACTN3 gene, as noted above, has a lot to do with their success in these competitions but it doesn’t tell the whole story. Sprinters have long limbs, which allow them to cover a greater distance with each stride in comparison to another with shorter limbs. Sprinters also have lower levels of body fat which translates to more speed. Where these lower levels of body fat make have them suffer in swimming competitions since fat floats, this helps in sprinting competitions due to less fat mass.


For those of you who are keeping up with the Olympics, you may have heard of Robel Kiros Habte. He finished with the worst time out of the 59 contestants and was only there due to an invitation extended to him by the International Swimming Federation who chooses people from countries that are underrepresented in the Games. This invitation shows that even the ‘best’ in their country is nowhere near good enough versus the best in the world.

But on the other hand, for the first time in history, swimmer Simone Manuel became the first black American to win gold in the 100m freestyle. There’s a first time for everything and exceptions don’t disprove rules.

Of course, Michael Phelps speaks for himself, with his 23rd gold medal win which broke a record that was standing for 2168 years.


Blacks dominate in American bodybuilding. This is due to them having lower fat-free body (FFB) and being more mesomorphic on average.

The winner of Mr. Olympia for the five years in a row is Phil Heath (who will win a sixth title next month during the Olympia). Blacks have consistently been in the top running in the IFBB (International Federation of Bodybuilding). This is due to their muscle insertions and lower average fat-free body that allows a high percentage of blacks to compete. Moreover, I’d say that genetically speaking, blacks have a better chance to win over whites since they have a more sculpted physique naturally, which comes down to evolutionary selection

Some people may say that the above sports are tainted due to performance enhancing drug (PED) use. Though what they fail to realize is that drugs take you above and beyond your genetic limit. These people are already genetic freaks of nature and taking drugs just makes them that much better. You can’t take someone with garbage genetics, have him shoot up for years and bust his ass in the gym to be Mr. Olympia. Just like you can’t take someone with garbage genetics and the wrong proportions, inject them with PEDs and expect them to do well in powerlifting and Strongman competitions. The genetic potential is already there in these athletes and PEDs take them above and beyond what is naturally possible.

Strength and Mortality

Finally, to round this up, there is a correlation between strength and mortality. With a sample of 8762 men between the ages of 20 and 80, it was found that muscular strength was inversely and independently associated with death from all causes and cancer in men even after adjusting for cardiorespiratory fitness and other possible confounders. From the discussion of the paper:

The analysis on the combined effects of muscular strength and cardiorespiratory fitness with all cause mortality showed that the age adjusted death rate in men with high levels of both muscular strength and cardiorespiratory fitness was 60% lower (P<0.001) than the death rate in the group of unfit men with the lowest levels of muscular strength. These results highlight the importance of having at least moderate levels of both muscular strength and cardiorespiratory fitness to reduce risk of death from all causes and cancer in this population of men.

The point of bringing this paper up is that Caucasians and Asians are stronger than blacks, and also live longer. This is just like the correlation between IQ and life expectancy. Since men with higher levels of strength live longer than men with lower levels of strength, this strengthens my hypothesis for strength-based competitions and the racial mix of the competitions. Caucasians and East Asians, who have higher IQs than blacks, are also stronger than them on average, which also correlates with life expectancy.

(For more information see Steve Sailer’s post on West African and East Africans in sprinting and distance running as well as Razib Khan’s post on West Africans and their domination of sprinting competitions.)


HBD is evident in all of our lives. Though many of us don’t bring it up, it’s evident in the sports we watch to everyday life. The reason why there are racial disparities in the upper echelons of professional sports has to do with muscle fiber typing as well as those who are genetically predisposed to do well in these competitions. West Africans dominate in sprinting competitions and others where they are able to use their longer limbs and fast twitch fibers whereas Caucasians and Asians dominate in strength sports due to their limb length and slow twitch fibers. Professional sports proves what is evident in our everyday lives and, subconsciously at least, the average person sees this.

Black-White Differences in Anatomy and Physiology: Black Athletic Superiority

3000 words

Due to evolving in different climates, the different races of Man have differing anatomy and physiology. This, then, leads to differences in sports performance—certain races do better than others in certain bouts of athletic prowess, and this is due to, in large part, heritable biological/physical differences between blacks and whites. Some of these differences are differences in somatotype, which bring a considerable advantage for, say, runners (an ecto-meso, for instance, would do very well in sprinting or distance running depending on fiber typing). This article will discuss differences in racial anatomy and physiology (again) and how it leads to disparities in certain sports performance.

Kerr (2010) argues that racial superiority in sport is a myth. (Read my rebuttal here.) In his article, Kerr (2010) attempts to rebut Entine’s (2000) book Taboo: Why Black Athletes Dominate Sports and Why We’re Afraid to Talk About It. In a nutshell, Kerr (2010) argues that race is not a valid category; that other, nongenetic factors play a role other than genetics (I don’t know if anyone has ever argued if it was just genetics). Race is a legitimate biological category, contrary to Kerr’s assertions. Kerr, in my view, strawman’s Entine (2002) by saying he’s a “genetic determinist”, but while he does discuss biological/genetic factors more than environmental ones, Entine is in no way a genetic determinist (at least that’s what I get from my reading of his book, other opinions may differ). Average physical differences between races are enough to delineate racial categories and then it’s only logical to infer that these average physical/physiological differences between the races (that will be reviewed below) would infer an advantage in certain sports over others, while the ultimate cause was the environment that said race’s ancestors evolved in (causing differences in somatotype and physiology).

Black athletic superiority has been discussed for decades. The reasons are numerous and of course, this has even been noticed by the general public. In 1991, half of the respondents of a poll on black vs. whites in sports “agreed with the idea that “blacks have more natural physical ability,“” (Hoberman, 1997: 207). Hoberman (1997) of course denies that there is any evidence that blacks have an advantage over whites in certain sports that come down to heritable biological factors (which he spends the whole book arguing). However, many blacks and whites do, in fact, believe in black athletic superiority and that physiologic and anatomic differences between the races do indeed cause racial differences in sporting performance (Wiggins, 1989). Though Wiggins (1989: 184) writes:

The anthropometric differences found between racial groups are usually nothing more than central tendencies and, in addition, do not take into account wide variations within these groups or the overlap among members of different races. This fact not only negates any reliable physiological comparisons of athletes along racial lines, but makes the whole notion of racially distinctive physiological abilities a moot point.

This is horribly wrong, as will be seen throughout this article.

The different races have, on average, differing somatotypes which means that they have different anatomic proportions (Malina, 1969):

Data from Malina, (1969: 438) n Mesomorph Ectomorph Endomorph
Blacks 65 5.14 2.99 2.92
Whites 199 4.29 2.89 3.86
Data from Malina (1969: 438) Blacks Whites
Thin-build body type 8.93 5.90
Submedium fatty development 48.31 29.39
Medium fleshiness 33.69 43.63
Fat and very fat categories 9.09 21.06

This was in blacks and whites aged 6 to 11. Even at these young ages, it is clear that there are considerable anatomic differences between blacks and whites which then lead to differences in sports performance, contra Wiggins (1989). A basic understanding of anatomy and how the human body works is needed in order to understand how and why blacks dominate certain sports over whites (and vice versa). Somatotype is, of course, predicated on lean mass, fat mass, bone density, stature, etc, which are heritable biological traits, thus, contrary to popular belief that somatotyping holds no explanatory power in sports today (see Hilliard, 2012).

One variable that makes up somatotype is fat-free body mass. There are, of course, racial differences in fat mass, too (Vickery, Cureton, and Collins, 1988; Wagner and Heyward, 2000). Lower fat mass would, of course, impede black excellence in swimming, and this is what we see (Rushton, 1997; Entine, 2000). Wagner and Heyward (2000) write:

Our review unequivocally shows that the FFB of blacks and whites differs significantly. It has been shown from cadaver and in vivo analyses that blacks have a greater BMC and BMD than do whites. These racial differences could substantially affect measures of body density and %BF. According to Lohman (63), a 2% change in the BMC of the body at a given body density could, theoretically, result in an 8% error in the estimation of %BF. Thus, the BMC and BMD of blacks must be considered when %BF is estimated.

While Vickery, Cureton, and Collins (1988) found that blacks had thinner skin folds than whites, however, in this sample, somatotype did not explain racial differences in bone density, like other studies (Malina, 1969), Vickery, Cureton, and Collins (1988) found that blacks were also more likely to be mesomorphic (which would then express itself in racial differences in sports).

Hallinan (1994) surveyed 32 sports science, exercise physiology, biomechanics, motor development, motor learning, and measurement evaluation textbooks to see what they said racial differences in sporting performance and how they explained them. Out of these 32 textbooks, according to Wikipedia, these “textbooks found that seven [textbooks] suggested that there are biophysical differences due to race that might explain differences in sports performance, one [textbook] expressed caution with the idea, and the other 24 [textbooks] did not mention the issue.” Furthermore, Strklaj and Solyali (2010), in their paper “Human Biological Variation in Anatomy Textbooks: The Role of Ancestry” write that their “results suggest that this type of human variation is either not accounted for or approached only superficially and in an outdated manner.

It’s patently ridiculous that most textbooks on the anatomy and physiology of the human body do not talk about the anatomic and physiologic differences between racial and ethnic groups. Hoberman (1997) also argues the same, that there is no evidence to confirm the existence of black athletic superiority. Of course, many hypotheses have been proposed to explain how and why blacks are at an inherent advantage in sport. Hoberman (1997: 269) discusses one, writing (quoting world record Olympian in the 400-meter dash, Lee Evans):

“We were bred for it [athletic dominance] … Certainly the black people who survived in the slave ships must have contained the highest proportion of the strongest. Then, on the plantations, a strong black man was mated with a strong black woman. We were simply bred for physical qualities.”

While Hoberman (1997: 270-1) also notes:

Finally, by arguing for a cultural rather than a biological interpretation of “race,” Edwards proposed that black athletic superiority results from “a complex of societal conditions” that channels a disproporitionate number of talented blacks into athletic careers.

The fact that blacks were “bred for” athletic dominance is something that gets brought up often but has little (if any) empirical support (aside from just-so stories about white slavemasters breeding their best, biggest and strongest black slaves). The notion that “a complex of societal conditions” (Edwards, 1971: 39) explains black dominance in sports, while it has some explanatory power in regard to how well blacks do in sporting competition, it, of course, does not tell the whole story. Edwards (1978: 39) argues that these complex societal conditions “instill a heightened motivation among black male youths to achieve success in sports; thus, they channel a proportionately greater number of talented black people than whites into sports participation.” While this may, in fact, be true, this does nothing to rebut the point that differences in anatomic and physiologic factors are a driving force in racial differences in sporting performance. However, while these types of environmental/sociological arguments do show us why blacks are over-represented in some sports (because of course motivation to do well in the sport of choice does matter), they do not even discuss differences in anatomy or physiology which would also be affecting the relationship.

For example, one can have all of the athletic gifts in the world, one can be endowed with the best body type and physiology to do well in any type of sport you can imagine. However, if he does not have a strong mind, he will not succeed in the sport. Lippi, Favaloro, and Guidi (2008) write:

An advantageous physical genotype is not enough to build a top-class athlete, a champion capable of breaking Olympic records, if endurance elite performances (maximal rate of oxygen uptake, economy of movement, lactate/ventilatory threshold and, potentially, oxygen uptake kinetics) (Williams & Folland, 2008) are not supported by a strong mental background.

Any athlete—no matter their race—needs a strong mental background, for if they don’t, they can have all of the physical gifts in the world, they will not become top-tier athletes in the sport of their choice; advantageous physical factors are imperative for success in differing sports, though myriad variables work in concert to produce the desired effect so you cannot have one without the other. On the other side, one can have a strong mental background and not have the requisite anatomy or physiology needed to succeed in the sport in question, but if he has a stronger mind than the individual with the requisite morphology, then he probably will win in a head-to-head competition. Either way, a strong mind is needed for strong performance in anything we do in life, and sport is no different.

Echoing what Hoberman (1997) writes, that “racist” thoughts of black superiority in part cause their success in sport, Sheldon, Jayaratne, and Petty (2007) predicted that white Americans’ beliefs in black athletic superiority would coincide with prejudice and negative stereotyping of black’s “intelligence” and work ethic. They studied 600 white men and women to ascertain their beliefs on black athletic superiority and the causes for it. Sheldon, Jayaratne, and Petty (2007: 45) discuss how it was believed by many, that there is a “ perceived inverse relationship between athleticism and intelligence (and hard work).” (JP Rushton was a big proponent of this hypothesis; see Rushton, 1997. It should also be noted that both Rushton, 1997 and Entine, 2000 believe that blacks’ higher rate of testosterone—3 to 15 percent— [Ross et al, 1986; Ellis and Nyborg, 1992; see rebuttal of both papers] causes their superior athletic performance, I have convincingly shown that they do not have higher levels of testosterone than other races, and if they do the difference is negligible.) However, in his book The Sports Gene: Inside the Science of Extraordinary Athletic Performance, Epstein (2014) writes:

With that stigma in mind [that there is an inverse relationship between “intelligence” and athletic performance], perhaps the most important writing Cooper did in Black Superman was his methodological evisceration of any supposed inverse link between physical and mental prowess. “The concept that physical superiority could somehow be a symptom of intellectual superiority became associated with African Americans … That association did not begin until about 1936.”

What Cooper (2004) implied is that there was no “inverse relationship” with intelligence and athletic ability until Jesse Owens blew away the competition at the 1936 Olympics in Berlin, Germany. In fact, the relationship between “intelligence” and athletic ability is positive (Heppe et al, 2016). Cooper is also a co-author of a paper Some Bio-Medical Mechanisms in Athletic Prowess with Morrison (Morrison and Cooper, 2006) where they argue—convincingly—that the “mutation appears to have triggered a series of physiological adjustments, which have had favourable athletic consequences.

Thus, the hypothesis claims that differences in glucose conversion rates between West African blacks and her descendants began, but did not end with the sickling of the hemoglobin molecule, where valine is substituted for glutamic acid, which is the sixth amino acid of the beta chain of the hemoglobin molecule. Marlin et al (2007: 624) showed that male athletes who were inflicted with the sickle cell trait (SCT) “are able to perform sprints and brief exercises at the highest levels.” This is more evidence for Morrison and Cooper’s (2006) hypothesis on the evolution of muscle fiber typing in West African blacks.

Bejan, Jones, and Charles (2010) explain that the phenomenon of whites being faster swimmers in comparison to blacks being faster runners can be accounted for by physics. Since locomotion is a “falling-forward cycle“, body mass falls forward and then rises again, so mass that falls from a higher altitude falls faster and forward. The altitude is set by the position of center of mass above the ground for running, while for swimming it is set by the body rising out of the water. Blacks have a center of gravity that is about 3 percent higher than whites, which implies that blacks have a 1.5 percent speed advantage in running whereas whites have a 1.5 percent speed advantage in swimming. In the case of Asians, when all races were matched for height, Asians fared even better, than whites in swimming, but they do not set world records because they are not as tall as whites (Bejan, Jones, and Charles, 2010).

It has been proposed that stereotype threat is part of the reasons for East African running success (Baker and Horton, 2003). They state that many theories have been proposed to explain black African running success—from genetic theories to environmental determinism (the notion that physiologic adaptations to climate, too, drive differences in sporting competition). Baker and Horton (2003) note that “that young athletes have internalised these stereotypes and are choosing sport participation accordingly. He speculates that this is the reason why white running times in certain events have actually decreased over the past few years; whites are opting out of some sports based on perceived genetic inferiority.” While this may be true, this wouldn’t matter, as people gravitate toward what they are naturally good at—and what dictates that is their mind, anatomy, and physiology. They pretty much argue that stereotype threat is a cause of East African running performance on the basis of two assertions: (1) that East African runners are so good that it’s pointless to attempt to win if you are not East African and (2) since East Africans are so good, fewer people will try out and will continue the illusion that East Africans would dominate in middle- and long-distance running. However, while this view is plausible, there is little data to back the arguments.

To explain African running success, we must do it through a systems view—not one of reductionism (i.e., gene-finding). We need to see how the systems in question interact with every part. So while Jamaicans, Kenyans, and Ethiopians (and American blacks) do dominate in running competitions, attempting to “find genes” that account for success n these sports seems like a moot point—since the whole system is what matters, not what we can reduce the system in question to.

However, there are some competitions that blacks do not do so well in, and it is hardly discussed—if at all—by any author that I have read on this matter. Blacks are highly under-represented in strength sports and strongman competitions. Why? My explanation is simple: the causes for their superiority in sprinting and distance running (along with what makes them successful at baseball, football, and basketball) impedes them from doing well in strength and strongman competitions. It’s worth noting that no black man has ever won the World’s Strongest Man competition (indeed the only African country to even place—Rhodesia—was won by a white man) and the causes for these disparities come down to racial differences in anatomy and physiology.

I discussed racial differences in the big four lifts and how racial differences in anatomy and physiology would contribute to how well said race performed on the lift in question. I concluded that Europeans and Asians had more of an advantage over blacks in these lifts, and the reasons were due to inherent differences in anatomy and physiology. One major cause is also the differing muscle fiber typing distribution between the races (Alma et al, 1986; Tanner et al, 2002Caesar and Henry, 2015 while blacks’ fiber typing helps them in short-distance sprinting (Zierath and Hawley, 2003). Muscle fiber typing is a huge cause of black athletic dominance (and non-dominance). Blacks are not stronger than whites, contrary to popular belief.

I also argued that Neanderthals were stronger than Homo sapiens, which then had implications for racial differences in strength (and sports). Neanderthals had a wider pelvis than our species since they evolved in colder climes (at the time) (Gruss and Schmidt, 2016). With a wider pelvis and shorter body than Homo sapiens, they were able to generate more power. I then implied that the current differences in strength and running we see between blacks and whites can be used for Neanderthals and Homo sapiens, thusly, evolution in differing climates lead to differences in somatotype, which eventually then lead to differences in sporting competition (what Baker and Horton, 2003 term “environmental determinism” which I will discuss in the context of racial differences in sports in the future).

Finally, blacks dominate the sport of bodybuilding, with Phil Heath dominating the competition for the past 7 years. Blacks dominate bodybuilding because, as noted above, blacks have thinner skin folds than whites, so their striations in their muscles would be more prevalent, on average, at the same exact %BF. Bodybuilders and weightlifters were similar in mesomorphy, but the bodybuilders showed more musculature than the bodybuilders whereas the weightlifters showed higher levels of body fat with a significant difference observed between bodybuilders and weightlifters in regard to endomorphy and ectomorphy (weightlifters skewing endo, bodybuilders skewing ecto, as I have argued in the past; Imran et al, 2011).

To conclude, blacks do dominate American sporting competition, and while much ink has been spilled arguing that cultural and social—not genetic or biologic—factors can explain black athletic superiority, they clearly work in concert with a strong mind to produce the athletic phenotype, no one factor has prominence over the other; though, above all, if one does not have the right mindset for the sport in question, they will not succeed. A complex array of factors is the cause of black athletic dominance, including muscle fibers, the type of mindset, anatomy, overall physiology and fat mass (among other variables) explain the hows and whys of black athletic superiority. Cultural and social explanations—on their own—do not tell the whole story, just as genetic/biologic explanations on their own would not either. Every aspect—including the historical—needs to be looked at when discussing the dominance (or lack thereof) in certain sports along with genetic and nongenetic factors to see how and why certain races and ethnies excel in certain sports.

Homo Neanderthalis vs. Homo Sapiens Sapiens: Who is Stronger? Implications for Racial Strength Differences

1300 words

Unfortunately, soft tissue does not fossilize (which is a problem for facial reconstructions of hominins; Stephan and Henneberg, 2001; I will cover the recent ‘reconstructions’ of Neanderthals and Nariokotome boy soon). So saying that Neanderthals had X percent of Y fiber type is only conjecture. However, to make inferences on who was stronger, I do not need such data. I only need to look at the morphology of the Neanderthals and Homo sapiens, and from there, inferences can be made as to who was stronger. I will argue that Neanderthals were stronger which is, of course, backed by solid data.

Neanderthals had wider pelves than Homo sapiens. Wider pelves in colder climes are due to adaptations. Although Neanderthals had wider pelves than ours, they had infants around the same size as Homo sapiens, which implies that Neanderthals had the same obstetric difficulties that we do. Neanderthals also had a pelvis that was similar to Heidelbergensis, however, most of the pelvic differences Neanderthals had that were thought to be derived traits are, in fact, ancestral traits—except for the cross-sectional shape of the pubic ramus (Gruss and Schmidt, 2015). Since Neanderthals had wider pelves and most of their pelvis were ancestral traits, then wide pelves may have been a trait of ancestral Homo (Trinkaus, Holliday, and Aurbach, 2014).

Hominins do need wider pelves in colder climates, as it is good for heat retention, however (see East Asians and Northern Europeans). Also, keep in mind that Neanderthals were shorter than us—with the men averaging around 5 feet five inches, and the women averaging about 5 feet, about 5.1 inches shorter than post-WW II Europeans (Helmuth, 1998).

So what does a wider pelvis mean? Since the Neanderthals were shorter than us and also had a wider pelvis, they had a lower center of gravity in comparison to us. Homo sapiens who came Out of Africa, had a narrower pelvis since narrow pelves are better to dissipate heat (Gruss and Schmidt, 2015). Homo sapiens would have been better adapted to endurance running and athleticism, in comparison to the wide-pelved Neanderthals.

People from tropical climates have longer limbs, and are tall and narrow (which is also good for endurance running/sprinting) while people from colder climates are shorter and more ‘compact’ (Lieberman, 2015: 113-114) with a wide pelvis for heat retention (Gruss and Schmidt, 2015). So, clearly, due to the differences in pelvic anatomy between Homo sapiens and Neanderthals,

Furthermore, due to the length of Neanderthal clavicles, it was thought that they had long clavicles which would have impeded strength. However, when the clavicles were reanalyzed it was discovered that when the clavicles were adjusted with the body size of Neanderthals—and not compared with the humeral lengths—Neanderthals had a similar clavicular length, which implies a similar shoulder breadth as well, to Homo sapiens (Trinkaus, Holliday, and Aurbach, 2014). This is another clue that Neanderthals were stronger.

Yet more evidence comes from comparing the bone density of Neanderthal bones to that of Homo sapiens. Denser bones would imply that the body would be able to handle a heavier load, and thusly generate more power. In adolescent humans, muscle power predicts bone strength (Janz et al, 2016). So if the same holds true for Neanderthals—and I don’t see why not—then Neanderthals would have higher muscle power since it predicts bone strength.

Given the “heavy musculature” of Neanderthals, along with high bone robusticity, then they must have had denser bones than Homo sapiens (Friedlander and Jordan, 1994). So since Neanderthals had denser bones, then they had higher muscle power; they had a lower center of gravity due to having a wider pelvis and being shorter than Homo sapiens whose body was heat-adapted. Putting this all together, the picture is now becoming clearer that Neanderthals were, in fact, way stronger than Homo sapiens.

Another cause for these anatomical differences between Neanderthals and Homo sapiens is completely independent of cold weather. Neanderthals had an enlarged thorax (rib cage), which evolved to hold an enlarged liver, which is responsible for metabolizing large amounts of protein. Since protein has the highest thermic effect of food (TEF), then they would have had a higher metabolism due to a higher protein diet which would also have resulted in an enlarged bladder and kidneys which are necessary to remove urea, which possibly would have also contributed to a wider pelvis for Neanderthals (Ben-Dor, Gopher, and Barkai, 2016).

During glacial winters, Neanderthals would have consumed 74-85 percent of their calories from fat, with the rest coming from protein (Ben-Dor, Gopher, and Barkai, 2016). Neanderthals also consumed around 3,360-4,480 kcal per day (Steegman, Cerny, and Holliday, 2002). Let’s assume that Neanderthals averaged 3800 kcal per day. Since the upper limit of protein intake is 3.9 g/bw/day (erectus) and 4.0 g/bw/day for Homo sapiens (Ben-Dor et al, 2011), then Neanderthals would have had a theoretical higher upper limit due to having larger organs, which are useful in processing large amounts of protein. The protein intake for a Neanderthal male was between estimated to be between 985 kcal (low end) to 1170 kcal (high end). It was estimated that Neanderthal males had a protein intake of about 292 grams per day, or 1,170 kcal (Ben-Dor, Gopher, and Holliday, 2016: 370).

Assuming that Neanderthals did not eat carbohydrates during glacial winters (and even if a small amount were eaten, the model would not be affected) and an upper limit of protein intake of 300 grams per day for Neanderthal males, this implies that 74-85 percent of their diet came from animal fat—the rest being protein. Protein is the most thermogenic macro (Corvelli et al, 1997; Eisenstein et al, 2002; Buchholz and Schoeller, 2004; Halton and Hu, 2004; Gillingham et al, 2007; Binns, Grey, and Di Brezzo, 2014). So since Neanderthals ate a large amount of protein, along with their daily activities, they had to have had a high metabolic rate.

To put into perspective how much protein Neanderthals ate, the average American man eats about 100 grams of protein per day. In an analysis of the protein intake of Americans from 2003-2004, it was found that young children ate about 56 grams of protein per day, adults aged 19-30 ate about 91 grams of protein per day, and the elderly ate about 56 grams of protein per day (Fulgoni, 2008). Neanderthals ate about 3 times the amount of protein than we do, which would lead to organ enlargement since larger organs are needed to metabolize said protein as well. Another factor in the increase of metabolism for Neanderthals was the fact that it was, largely, extremely cold. Shivering increases metabolism (Tikuisis, Bell, and Jacobs, 1985; van Ooijen et al, 2005). So the Neanderthal metabolism would have been revved up close to a theoretical maximum capacity.

The high protein intake of Neanderthals is important because high amounts of protein are needed to build muscle. Neanderthals consumed a sufficient amount of kcal, along with 300 grams of protein per day on average for a Neanderthal male, which would have given Neanderthals yet another strength advantage. 

I am also assuming that Neanderthals had slow twitch muscle fibers since they have wider pelves, along with evolving in higher latitudes (see Kenyans, East Asians, European muscle fiber distribution), they would have an abundance of type slow twitch muscle fibers, in comparison to fast twitch muscle fibers, however, they also have more slow twitch fibers which Europeans have, while African-Americans (West-African descendants) have a higher amount of fast twitch fibers. (Caesar and Henry, 2015). So now, thinking of everything I explained above and replacing Neanderthals with Europeans and Homo sapiens with Africans, who do you think would be stronger? Clearly, Europeans, which is what I have argued for extensively. African morphology (tall, lanky, high limb ratio) is not conducive to strength; whereas European morphology (wide pelvis, low limb ratio, an abundance of slow twitch fibers) is.

The implications for these anatomic differences between Neanderthals and Homo sapiens and how it translates into racial differences will be explored more in the future. This was just to lay the anatomic and morphologic groundwork in regards to strength and cold weather adaptations. Nevertheless, the evidence that Neanderthals were stronger/more powerful than Europeans stands on solid ground, and the same does hold for the differences in strength between Africans and Europeans. The evolution of racial pelvic variation is extremely important to understand if you want to understand racial differences in sports. 

Race, Testosterone, and Honor Culture

2300 words

Misinformation about testosterone and strength in regards to race is rampant in the HBD-o-sphere. One of the most oft-repeated phrases is that “Blacks have higher levels of testosterone than whites”, even after controlling for numerous confounds. However, the people who believe this literally only cite one singular study with 50 blacks and 50 whites. Looking at more robust data with higher ns shows a completely different story. Tonight I will, again, go through the race/testosterone conundrum (again).

Type I fibers fire first when heavy lifting. Whites have more type I fibers. Powerlifters and Olympic lifters have a greater amount type IIa fibers, with fewer type IIx fibers (like whites). This explains why blacks are hardly represented in powerlifting and strongman competitions.

Somatype, too, also plays a role. Whites are more endo than blacks who are more meso. Endomorphic individuals are stronger, on average, than mesomorphic and ectomorphic individuals.

Blacks have narrower hips and pelves. This morphological trait further explains why blacks dominate sports. Some people may attempt to pick out one variable that I speak about (fiber type, morphology, somatype, fat mass, etc) and attempt to disprove it, thinking that disproving that variable will discredit my whole argument. However, fiber typing is set by the second trimester, with no change in fiber type from age 6 to adulthood (Bell et al, 1980).

It is commonly believed that blacks have higher levels of testosterone than whites. However, this claim is literally based off of one study (Ross et al, 1986) when other studies have shown low to no difference in T levels (Richards et al, 1992; Gapstur et al, 2002; Rohrmann et al, 2007; Mazur, 2009; Lopez et al, 2013; Richard et al 2014). People who still push the “blacks-have-higher-T-card” in the face of this evidence are, clearly, ideologues who want to cushion their beliefs when presented with contradictory evidence (Nyhan and Reifler, 2010).

‘Honor Culture’ and testosterone

In all of my articles on this subject, I have stated—extensively—that testosterone is mediated by the environment. That is, certain social situations can increase testosterone. This is a viewpoint that I’ve emphatically stated. I came across a paper while back that talks about a sociological perspective (I have huge problems with social ‘science’, [more on that soon] but this study was very well done) in regards to the testosterone difference between blacks and whites.

Some people when they read this, however, may go immediately to the part of the paper that says what they want it to say without fully assessing the paper. In this section, I will explain the paper and how it confirms my assertions/arguments.

Mazur (2016) begins the paper talking about ‘honor culture‘, which is a culture where people avoid intentionally offending others while also maintaining a status for not backing down from a confrontation. This theory was proposed by Richard Nisbett in 1993 to explain why the South had higher rates of violence—particularly the Scotch-Irish.

However parsimonious the theory may sound, despite its outstanding explanatory power, it doesn’t hold while analyzing white male homicides in the South. It also doesn’t hold analyzing within-county homicide rates either, since apparently poverty better explains higher homicide rates.

But let’s assume it’s true for blacks. Let’s assume the contention to be true that there is an ‘honor culture’ that people take part in.

Young black men with no education had higher levels of testosterone than educated whites and blacks. Looking at this at face value—literally going right to the section of the paper that says that poor blacks had higher testosterone, nearly 100 ng/ml higher than the mean testosterone of whites. As Mazur (2016) notes, this contradicts his earlier 2009 study in which he found no difference in testosterone between the races.


Note the low testosterone for both races at age 20-29—ranging from about 515 to 425—why such low testosterone levels for young men? Anyway, the cause for the higher levels is due to the type of honor culture that blacks participate in, according to Mazur (which is consistent with the data showing that testosterone rises during conflict/aggressive situations).

Mazur cites Elijah Anderson, saying that most youths have a “code of the streets” they take part in, which have to do with interpersonal communication such as “gait and verbal expressions” to deter aggressive behavior.

Testosterone is not a causal variable in regards to violent behavior. But it does rise during conflicts with others, watching a favorite sports team, asserting dominance, and even how you carry yourself (especially your posture). Since low-class blacks participate in these types of behaviors, then they would have higher levels of testosterone due to needing to “keep their status.”

When testosterone rises in these situations, it increases the response threat in mens’ brains, most notably showing increased activity in the amygdala. Further, dominant behavior and posture also increase testosterone levels. Putting this all together, since blacks with only a high school education have higher testosterone levels and are more likely to participate in honor culture compared to whites and blacks with higher educational achievement, then they would have higher testosterone levels than whites and blacks with a high school education who do not participate in honor culture.

Further, as contrary to what I have written in the past (and have since rescinded), there is no indication of higher testosterone levels in black women with low education. It seems this ‘honor culture’ effect on testosterone only holds for black men with only a high school education.

Mazur’s (2016) most significant finding was that black men aged 20-29 with only a high school education had 91 ng/ml higher testosterone than whites. Among older and/or educated men, testosterone did not vary. This indicates that since they have attained higher levels of educational success, there is no need to participate in ‘honor culture’.

This is yet further evidence for my assertion that environmental variables such as posture, dominance, and aggressive behavior raise testosterone levels.

The honor culture hypothesis is found to hold in Brazil in a comparative study of 160 inmates and non-inmates (De Souza et al, 2016). As Mazur (2016) notes, the honor culture hypothesis could explain the high murder rate for black Americans—the need to ‘keep their status’. It’s important to note that this increase in testosterone was not noticed in teenage or female blacks (because they don’t participate in honor culture).

There is a perfectly good environmental—not genetic—reason for this increase in testosterone in young blacks with only a high school education. Now that we know this, back to race and strength.

Mazur (2009) found that black men in the age range of 20-69, they averaged .39 ng/ml higher testosterone than whites, which is partly explained by lower marriage rates and low adiposity. White men are more likely to be obese than black men, since black men with more African ancestry are less likely to be obese. When controlling for BMI, blacks are found to have 2.5-4.9 percent more testosterone than whites (Gapstur et al, 2002, Rohrmann et al, 2007, Richard et al, 2014). There is little evidence for the assertion that blacks have higher levels of testosterone without environmental triggers.

Blacks between the age of 12 and 15 average lower levels of testosterone than whites. However, after the age of 15, “testosterone levels increase rapidly” with blacks having higher peak levels than whites (seen in table 2 below). After adjusting for the usual confounds (BMI, smoking, age, physical activity, and waist circumference), blacks still had higher levels of testosterone—which is attributed to higher levels of lean mass.


As seen above in table 2 from Hu et al (2014), the difference in total testosterone between blacks and whites aged 20-39 was 6.29 ng/ml and 5.04 ng/ml respectively, with free testosterone for whites being 11.50 and 13.56 for blacks and finally bioavailable testosterone for whites and blacks aged 20-39 was 281.23 and 327.18 ng/ml respectively. These small differences in testosterone cannot account for racial disparities in violence nor prostate cancer—since there is no relationship between prostate cancer and testosterone (Stattin et al, 2003; Michaud, Billups, and Partin, 2015).

In regards to Africans, the best studies I can find comparing some African countries with the West study salivary testosterone. However, there is a direct correlation between salivary testosterone and free serum testosterone (Wang et al, 1981; Johnson, Joplin, and Burrin, 1987). Of the studies I could find, Kenyan pastoralists called the Ariaal have lower levels of testosterone than Western men (Campbell, O’Rourke, and Lipson, 2003; Campbell, Gray, and Ellison, 2006) while men in Zimbabwe had levels “much lower” compared to Western populations (Lukas, Campbell, and Ellison, 2004). Lastly, among men aged 15 to 30, salivary testosterone levels in an American sample was 335 pmol//l compared to 286 pmol/l in men from the Congo (Elisson et al, 2002). Even certain African populations don’t have higher testosterone levels than Western peoples.


The meme that blacks have higher rates of testosterone in comparison to whites needs to be put to rest. This is only seen in blacks who participate in ‘honor culture’, which is an environmental variable. This is in contrast to people who believe that it is genetic in nature—environmental variables can and do drive hormones. Mazur (2016) is proof of that. Mazur (2016) also shows that the honor culture hypothesis doesn’t hold for teens or black males—so they don’t have elevated levels of testosterone. Certain studies of African populations, however, do not show higher levels of testosterone than Western populations.

Looking at the complete literature—rather than a select few studies— we can see that testosterone levels between white and black Americans are not as high as is commonly stated (Richards et al, 1992; Gapstur et al, 2002; Rohrmann et al, 2007; Mazur, 2009; Lopez et al, 2013; Hu et al, 2014; Richard et al, 2014). Further, even if blacks did have higher levels of testosterone than whites—across the board (sans honor culture), it still wouldn’t explain higher rates of black violence when compared to whites, nor would it explain higher prostate cancer rates (Stattin et al, 2003; Michaud, Billups, and Partin, 2015).

Only blacks with low educational achievement have higher levels of testosterone—which, even then is not enough to explain higher rates of violence or prostate cancer acquisition. Other factors explain the higher murder rate (i.e., honor culture, which increases testosterone, the environmental trigger matters first and foremost) and violent crime that blacks commit. But attempting to explain it with 30-year-old studies (Ross et al, 1986) and studies that show that environmental factors increase testosterone (Mazur, 2016) don’t lend credence to that hypothesis.


Bell, R. D., Macdougall, J. D., Billeter, R., & Howald, H. (1980). Muscle fiber types and morphometric analysis of skeletal muscle in six-year-old children. Medicine & Science in Sports & Exercise,12(1). doi:10.1249/00005768-198021000-00007

Campbell, B., O’rourke, M. T., & Lipson, S. F. (2003). Salivary testosterone and body composition among Ariaal males. American Journal of Human Biology,15(5), 697-708. doi:10.1002/ajhb.10203

Campbell, B. C., Gray, P. B., & Ellison, P. T. (2006). Age-related patterns of body composition and salivary testosterone among Ariaal men of Northern Kenya. Aging Clinical and Experimental Research,18(6), 470-476. doi:10.1007/bf03324846

De Souza, Souza, B. C., Bilsky, W., & Roazzi, A. (2016). The culture of honor as the best explanation for the high rates of criminal homicide in Pernambuco: A comparative study with 160 convicts and non-convicts. Anuario de Psicología Jurídica,26(1), 114-121. doi:10.1016/j.apj.2015.03.001

Ellison, P. T., Bribiescas, R. G., Bentley, G. R., Campbell, B. C., Lipson, S. F., Panter-Brick, C., & Hill, K. (2002). Population variation in age-related decline in male salivary testosterone. Human Reproduction,17(12), 3251-3253. doi:10.1093/humrep/17.12.3251

Gapstur SM, Gann PH, Kopp P, Colangelo L, Longcope C, Liu K. Serum androgen concentrations in young men: a longitudinal analysis of associations with age, obesity, and race—the CARDIA male hormone study. Cancer Epidemiol Biomarkers Prev 2002; 11: 10417

Hu, H., Odedina, F. T., Reams, R. R., Lissaker, C. T., & Xu, X. (2014). Racial Differences in Age-Related Variations of Testosterone Levels Among US Males: Potential Implications for Prostate Cancer and Personalized Medication. Journal of Racial and Ethnic Health Disparities,2(1), 69-76. doi:10.1007/s40615-014-0049-8

Johnson, S. G., Joplin, G. F., & Burrin, J. M. (1987). Direct assay for testosterone in saliva: Relationship with a direct serum free testosterone assay. Clinica Chimica Acta,163(3), 309-318. doi:10.1016/0009-8981(87)90249-x

Lopez, D. S., Peskoe, S. B., Joshu, C. E., Dobs, A., Feinleib, M., Kanarek, N., . . . Platz, E. A. (2013). Racial/ethnic differences in serum sex steroid hormone concentrations in US adolescent males. Cancer Causes & Control,24(4), 817-826. doi:10.1007/s10552-013-0154-8

Lukas, W. D., Campbell, B. C., & Ellison, P. T. (2004). Testosterone, aging, and body composition in men from Harare, Zimbabwe. American Journal of Human Biology,16(6), 704-712. doi:10.1002/ajhb.20083

Mazur, A. (2009). The age-testosterone relationship in black, white, and Mexican-American men, and reasons for ethnic differences. The Aging Male,12(2-3), 66-76. doi:10.1080/13685530903071802

Mazur, A. (2016). Testosterone Is High among Young Black Men with Little Education. Frontiers in Sociology,1. doi:10.3389/fsoc.2016.00001

Michaud, J. E., Billups, K. L., & Partin, A. W. (2015). Testosterone and prostate cancer: an evidence-based review of pathogenesis and oncologic risk. Therapeutic Advances in Urology,7(6), 378-387. doi:10.1177/1756287215597633

Nyhan, B., & Reifler, J. (2010). When Corrections Fail: The Persistence of Political Misperceptions. Political Behavior,32(2), 303-330. doi:10.1007/s11109-010-9112-2

Richard, A., Rohrmann, S., Zhang, L., Eichholzer, M., Basaria, S., Selvin, E., . . . Platz, E. A. (2014). Racial variation in sex steroid hormone concentration in black and white men: a meta-analysis. Andrology,2(3), 428-435. doi:10.1111/j.2047-2927.2014.00206.x

Richards, R. J., Svec, F., Bao, W., Srinivasan, S. R., & Berenson, G. S. (1992). Steroid hormones during puberty: racial (black-white) differences in androstenedione and estradiol–the Bogalusa Heart Study. The Journal of Clinical Endocrinology & Metabolism,75(2), 624-631. doi:10.1210/jcem.75.2.1639961

Rohrmann, S., Nelson, W. G., Rifai, N., Brown, T. R., Dobs, A., Kanarek, N., . . . Platz, E. A. (2007). Serum Estrogen, But Not Testosterone, Levels Differ between Black and White Men in a Nationally Representative Sample of Americans. The Journal of Clinical Endocrinology & Metabolism,92(7), 2519-2525. doi:10.1210/jc.2007-0028

Ross R, Bernstein L, Judd H, Hanisch R, Pike M, Henderson B. Serum testosterone levels in healthy young black and white men. J Natl Cancer Inst. 1986 Jan;76(1):45–48

Stattin, P., Lumme, S., Tenkanen, L., Alfthan, H., Jellum, E., Hallmans, G., . . . Hakama, M. (2003). High levels of circulating testosterone are not associated with increased prostate cancer risk: A pooled prospective study. International Journal of Cancer,108(3), 418-424. doi:10.1002/ijc.11572

Wang, C., Plymate, S., Nieschlag, E., & Paulsen, C. A. (1981). Salivary Testosterone in Men: Further Evidence of a Direct Correlation with Free Serum Testosterone. The Journal of Clinical Endocrinology & Metabolism,53(5), 1021-1024. doi:10.1210/jcem-53-5-1021

Possibly Retracting My Article on HBD and Baseball

700 words

I am currently reading Taboo: Why Black Athletes Dominate Sports and Why We’re Afraid To Talk About It and came across a small section in the beginning of the book talking about black-white differences in baseball. It appears I am horribly, horribly wrong and it looks like I may need to retract my article HBD and Sports: Baseball. However, I don’t take second-hand accounts as gospel, so I will be purchasing the book that Entine cites, The Bill James Baseball Abstract 1987 to look into it myself and I may even do my own analysis on modern-day players to see if this still holds. Nevertheless, at the moment disregard the article I wrote last year until I look into this myself.

Excerpt from Taboo: Why Black Athletes Dominate Sports and Why We’re Afraid To Talk About It:

Baseball historian Bill James, author of dozens of books on the statistical twists of his favorite sport believes this trend [black domination in baseball] is not a fluke. In an intriguing study conducted in 1987, he compared the careers of hundreds of rookies to figure out what qualities best predict who would develop into stars. He noted many intangible factors, such as whether a player stays fit or is just plain lucky. The best predictors of long-term career success included the age of the rookie, his defensive position as a determinant in future hitting success (e.g., catchers fare worse than outfielders), speed, and the quality of the player’s team. But all of these factors paled when compared to the color of the player’s skin.

“Nobody likes to write about race,” James noted apologetically. “I thought I would do a [statistical] run of black players against white players, fully expecting that it would show nothing in particular or nothing beyond the outside range of chance, and I would file it away and never mention that I had looked at the issue at all.

James first compared fifty-four white rookies against the same number of black first-year players who had comparable statistics. “The results were astonishing,” James wrote. The black players:

* went on to have better major-league careers in 44 out of 54 cases

* played 48 percent more games

* had 66 percent more major league hits

* hit 93 percent more triples

* hit 66 percent more home runs

* scored 69 percent more runs

* stole 400 more bases (Entine, 2000: 22-23)

Flabbergasted at what he found, James ran a second study using forty-nine black/white comparisons. Again, blacks proved more durable, retained their speed longer, and were consistently better hitters. For example, he compared Ernie Banks, a power hitting shortstop for the Chicago Cubs, and Bernie Allen who broke in with Minnesota. They both reached the majors when they were twenty-three years old, were the same height and weight, and were considered equally fast. Over time, Allen bombed and Banks landed in the Hall of Fame. (Entine, 2000: 24)

In an attempt to correct for possible bias, James compared players with comparable speed statistics such as the number of doubles, triples, and stolen bases. He ran a study focused on players who had little speed. He analyzed for “position bias” and made sure that players in the same eras were being compared. Yet every time he crunched the numbers, the results broke down across racial lines. When comparing home runs, runs scored, RBIs or stolen bases, black players held an advantage a startling 80 percent of the time. “And I could identify absolutely no bias to help explain why this should happen,” James said in disbelief.

James also compared white Hispanic rookies whom he assumed faced an uphill battle similar to that for blacks, with comparable groups of white and black players. The blacks dominated the white Latinos by even more than they did white North Americans, besting them in 19 of the 26 comparisons. Blacks played 62 percent more games, hit 192 more home runs, drove in 125 percent more runs, and stole 30 percent more bases.

So why have blacks become the stars of baseball far out of proportion to their relative numbers? James eventually concluded that there were two possible explanations: “Blacks are better athletes because they are born better athletes, which is to say that it is genetic, or that they are born equal and become better athletes. (Entine, 2000: 24-25)

Black-White Differences in Muscle Fiber and Its Role In Disease and Obesity

1700 words

How do whites and blacks differ by muscle fiber and what does it mean for certain health outcomes? This is something I’ve touched on in the past, albeit briefly, and decided to go in depth on it today. The characteristics of skeletal muscle fibers dictate whether one has a higher or lower chance of being affected by cardiometabolic disease/cancer. Those with more type I fibers have less of a chance of acquiring diabetes while those with type II fibers have a higher chance of acquiring debilitating diseases. This has direct implications for health disparities between the two races.

Muscle fiber typing by race

Racial differences in muscle fiber typing explain differences in strength and mortality. I have, without a shadow of a doubt, proven this. So since blacks have higher rates of type II fibers while whites have higher rates of type I fibers (41 percent type I for white Americans, 33 percent type I for black Americans, Ama et al, 1985) while West Africans have 75 percent fast twitch and East Africans have 25 percent fast twitch (Hobchachka, 1988). Further, East and West Africans differ in typing composition, 75 percent fast for WAs and 25 percent fast for EAs, which has to do with what type of environment they evolved in (Hochhachka, 1998). What Hochhachka (1998) also shows is that high latitude populations (Quechua, Aymara, Sherpa, Tibetan and Kenyan) “show numerous similarities in physiological hypoxia defence mechanisms.” Clearly, slow-twitch fibers co-evolved here.

Clearly, slow-twitch fibers co-evolved with hypoxia. Since hypoxia is the deficiency in the amount of oxygen that reaches the tissues, populations in higher elevations will evolve hypoxia defense mechanisms, and with it, the ability to use the oxygen they do get more efficiently. This plays a critical role in the fiber typing of these populations. Since they can use oxygen more efficiently, they then can become more efficient runners. Of course, these populations have evolved to be great distance runners and their morphology followed suit.

Caesar and Henry (2015) also show that whites have more type I fibers than blacks who have more type II fibers. When coupled with physical inactivity, this causes higher rates of cancer and cardiometabolic disease. Indeed, blacks have higher rates of cancer and mortality than whites (American Cancer Society, 2016), both of which are due, in part, to muscle fiber typing. This could explain a lot of the variation in disease acquisition in America between blacks and whites. Physiologic differences between the races clearly need to be better studied. But we first must acknowledge physical differences between the races.

Disease and muscle fiber typing

Now that we know the distribution of fiber types by race, we need to see what type of evidence there is that differing muscle fiber typing causes differences in disease acquisition.

Those with fast twitch fibers are more likely to acquire type II diabetes and COPD (Hagiwara, 2013); cardiometabolic disease and cancer (Caesar and Henry, 2015); a higher risk of cardiovascular events (Andersen et al, 2015, Hernelahti et al, 2006); high blood pressure, high heart rate, and unfavorable left ventricle geometry leading to higher heart disease rates and obesity (Karjalainen et al, 2006) etc. Knowing what we know about muscle fiber typing and its role in disease, it makes sense that we should take this knowledge and acknowledge physical racial differences. However, once that is done then we would need to acknowledge more uncomfortable truths, such as the black-white IQ gap.

One hypothesis for why fast twitch fibers are correlated with higher disease acquisition is as follows: fast twitch fibers fire faster, so due to mechanical stress from rapid and forceful contraction, this leads the fibers to be more susceptible to damage and thus the individual will have higher rates of disease. Once this simple physiologic fact is acknowledged by the general public, better measures can be taken for disease prevention.

Due to differences in fiber typing, both whites and blacks must do differing types of cardio to stay healthy. Due to whites’ abundance of slow twitch fibers, aerobic training is best (not too intense). However, on the other hand, due to blacks’ abundance of fast twitch fibers, they should do more anaerobic type exercises to attempt to mitigate the diseases that they are more susceptible due to their fiber typing.

Black men with more type II fibers and less type I fibers are more likely to be obese than ‘Caucasian‘ men are to be obese (Tanner et al, 2001). More amazingly, Tanner et al showed that there was a positive correlation (.72) between weight loss and percentage of type I fibers in obese patients. This has important implications for African-American obesity rates, as they are the most obese ethny in America (Ogden et al, 2016) and have higher rates of metabolic syndrome (a lot of the variation in obesity does come down food insecurity, however). Leaner subjects had higher proportions of type I fibers compared to type II. Blacks have a lower amount of type I fibers compared to whites without adiposity even being taken into account. Not surprisingly, when the amount of type I fibers was compared by ethnicity, there was a “significant interaction” with ethnicity and obesity status when type I fibers were compared (Tanner et al, 2001). Since we know that blacks have a lower amount of type I fibers, they are more likely to be obese.

In Tanner et al’s sample, both lean blacks and whites had a similar amount of type I fibers, whereas the lean blacks possessed more type I fibers than the obese black sample. Just like there was a “significant interaction” between ethnicity, obesity, and type I fibers, the same was found for type IIb fibers (which, as I’ve covered, black Americans have more of these fibers). There was, again, no difference between lean black and whites in terms of type I fibers. However, there was a difference in type IIb fibers when obese blacks and lean blacks were compared, with obese blacks having more IIb fibers. Obese whites also had more type IIb fibers than lean whites. Put simply (and I know people here don’t want to hear this), it is easier for people with type I fibers to lose weight than those with type II fibers. This data is some of the best out there showing the relationship between muscle fiber typing and obesity—and it also has great explanatory power for black American obesity rates.


Muscle fiber differences between blacks and whites explain disease acquisition rates, mortality rates (Araujo et al, 2010), and differences in elite sporting competition between the races. I’ve proven that whites are stronger than blacks based on the available scientific data/strength competitions (click here for an in-depth discussion). One of the most surprising things that muscle fibers dictate is weight loss/obesity acquisition. Clearly, we need to acknowledge these differences and have differing physical activity protocols for each racial group based on their muscle fiber typing. However, I can’t help but think about the correlation between strength and mortality now. This obesity/fiber type study puts it into a whole new perspective. Those with type I fibers are more likely to be physically stronger, which is a cardioprotectant, which then protects against all-cause mortality in men (Ruiz et al, 2008; Volaklis, Halle, and Meisenger, 2015). So the fact that black Americans have a lower life expectancy as well as lower physical strength and more tpe II fibers than type I fibers shows why blacks are more obese, why blacks are not represented in strength competitions, and why blacks have higher rates of disease than other populations.The study by Tanner et al (2001) shows that there obese people are more likely to have type II fibers, no matter the race. Since we know that blacks have more type II fibers on average, this explains a part of the variance in the black American obesity rates and further disease acquisition/mortality.

The study by Tanner et al (2001) shows that there obese people are more likely to have type II fibers, no matter the race. Since we know that blacks have more type II fibers on average, this explains a part of the variance in the black American obesity rates and further disease acquisition/mortality.

Differences in muscle fiber typing do not explain all of the variance in disease acquisition/strength differences, however, understanding what the differing fiber typings do, metabolically speaking, along with how they affect disease acquisition will only lead to higher qualities of life for everyone involved.


Araujo, A. B., Chiu, G. R., Kupelian, V., Hall, S. A., Williams, R. E., Clark, R. V., & Mckinlay, J. B. (2010). Lean mass, muscle strength, and physical function in a diverse population of men: a population-based cross-sectional study. BMC Public Health,10(1). doi:10.1186/1471-2458-10-508

Andersen K, Lind L, Ingelsson E, Amlov J, Byberg L, Miachelsson K, Sundstrom J. Skeletal muscle morphology and risk of cardiovascular disease in elderly men. Eur J Prev Cardiol 2013.

Ama PFM, Simoneau JA, Boulay MR, Serresse Q Thériault G, Bouchard C. Skeletal muscle characteristics in sedentary Black and Caucasian males. J Appl Physiol 1986: 6l:1758-1761.

American Cancer Society. Cancer Facts & Figures for African Americans 2016-2018. Atlanta: American Cancer Society, 2016.

Ceaser, T., & Hunter, G. (2015). Black and White Race Differences in Aerobic Capacity, Muscle Fiber Type, and Their Influence on Metabolic Processes. Sports Medicine,45(5), 615-623. doi:10.1007/s40279-015-0318-7

Hagiwara N. Muscle fibre types: their role in health, disease and as therapeutic targets. OA Biology 2013 Nov 01;1(1):2.

Hernelahti, M., Tikkanen, H. O., Karjalainen, J., & Kujala, U. M. (2005). Muscle Fiber-Type Distribution as a Predictor of Blood Pressure: A 19-Year Follow-Up Study. Hypertension,45(5), 1019-1023. doi:10.1161/01.hyp.0000165023.09921.34

Hochachka, P.W. (1998) Mechanism and evolution of hypoxia-tolerance in humans. J. Exp. Biol. 201, 1243–1254

Karjalainen, J., Tikkanen, H., Hernelahti, M., & Kujala, U. M. (2006). Muscle fiber-type distribution predicts weight gain and unfavorable left ventricular geometry: a 19 year follow-up study. BMC Cardiovascular Disorders,6(1). doi:10.1186/1471-2261-6-2

Ogden C. L., Carroll, M. D., Lawman, H. G., Fryar, C. D., Kruszon-Moran, D., Kit, B.K., & Flegal K. M. (2016). Trends in obesity prevalence among children and adolescents in the United States, 1988-1994 through 2013-2014. JAMA, 315(21), 2292-2299.

Ruiz, J. R., Sui, X., Lobelo, F., Morrow, J. R., Jackson, A. W., Sjostrom, M., & Blair, S. N. (2008). Association between muscular strength and mortality in men: prospective cohort study. Bmj,337(Jul01 2). doi:10.1136/bmj.a439

Tanner, C. J., Barakat, H. A., Dohm, G. L., Pories, W. J., Macdonald, K. G., Cunningham, P. R., . . . Houmard, J. A. (2001). Muscle fiber type is associated with obesity and weight loss. American Journal of Physiology – Endocrinology And Metabolism,282(6). doi:10.1152/ajpendo.00416.2001

Volaklis, K. A., Halle, M., & Meisinger, C. (2015). Muscular strength as a strong predictor of mortality: A narrative review. European Journal of Internal Medicine,26(5), 303-310. doi:10.1016/j.ejim.2015.04.013