Are black america fighters regressing....

Are black america fighters regressing....? Every single heavyweight seems to be morbidly obese and pre diabetic, and apart from afew token athletes in the lower weight classes! the black fighters have gone missing, in such weight divisions as the middle-weight & super middle weight division... I think this is due to lifestyle, i am not sure what the percentage is! but are black people in america more likely to become morbidly obese..? There are two things which effect gene expression, and those two things are exercise and diet. And you only have to look at Floyd Mayweather, here is a professional athlete who brags and shows off eating refined fast food, and fizzy drinks........and you will probably have a bunch of retards copying such behaviors..... Unlike Bernard Hopkins, Floyd Mayweather is not playing two sides to the coin! and no matter what anybody says it does effect your conditioning and biological health, its proven science. "Floyd Mayweather struggled to throw over 400 punches the other night"....his body may still look lean and great, but biologically that's a whole different story.... "Black athletes just seem to love eating crap, i can remember when Adrien Broner was posting picture and picture on twitter of fizzy drinks, milk shakes and sweets........pathetic"... I think at a grass roots level in all of these Ghetto's, especially in america i think black communities just in general have terrible diets and lifestyles especially with the introduction of technology and computers..... In Britain black community's still have a sens of culture through food, and in general i just think both black and white people in Britain are more educated... You see all these thug workout video's, but like i have stated before there are two ways in which gene expression can be effected.. "Exercise and Nutrition"... I think the last wave of black athletes, there genetics where still holding up.... But as time progresses, and people continue to have bad lifestyles and pathetic nutrition...... All this does is produce weaker children.... Note: I think this is also a problem in the white communities, but the black communities in america seemed to have been hit very hard. You can also see this is sport such as track and field athletics, USA is no longer dominating or even producing athletes at the rate it used to! in multiple sprint events!