Their physical ability is obvious when looking at the physique of the average black and white man. Look at all those black men whose bodies look like Greek gods without spending any time in the gym. You can’t argue that they commit more crime due to higher testosterone without admitting that testosterone also makes them stronger.I was going to reply at Guy White's blog around the time he first posted this, but I must have been overwhelmed by the sheer number of bizarre assumptions underlying the comment and never completed a response.
For the moment, I'll just point out that more black than white young men in the U.S. report engaging in weight-lifting (44.5% vs. 30.7%) and calisthenics (41.9% vs. 28.9%) . How Guy White came to the opposite conclusion, I have no idea. Perhaps he was applying his brand of "logic" and generalizing from something like Herschel Walker's infamous claim of having never lifted weights.
 Dowda et al. Correlates of physical activity among U.S. Young adults, 18 to 30 years of age, from NHANES III. Annals of Behavioral Medicine Volume 26, Number 1 / August, 2003