Actually I do and I live and work in one of the blackest areas of the country.
Black people are far more likely to be fat and obese than any other race, followed by hispanics, then whites, then asians.
I blame the Soy/Processed food/high fat American diet.
So you must be parroting some TV or media driven stereotype that all Black Men are jacked fast athletes, all Asians know Karate and Math, Hispanics can only cut the grass and speak spanish, and White people are dangerous gun owning racists and dangerous out of control cops.
And as far as athletes go at the college level, adjusted for event or position there is no difference in race on body fat %. Now, people from other countries, who aren't exposed to horrible American food thats something else.
Why does Bernard Lagat clean up against Americans 10 years younger than him? He was raised on a natural diet. While Africans may consume large amounts of grain, the protein content is higher than sugar, and the saturated fat content is non-existent, making grain far better than soda, sugar, corn syrup and other sweeteners found in every food in the U.S, so my points are further substantiated.
Same thing, I've seen Asians born and raised in China, Vietnam, Korea but in America for school get super ripped and shredded at the gym, far more than any African American. Even U.S raised sprinters look fat compared to some of these guys. Its amazing how bad the American diet is.