Oh dear some of you really have no idea whatsoever do you.
The Kenyans that are good long distance runners when interviewed will tell you how they run miles to and from school each day as part of their training but heres the really important bit...they tend to live and train at high altitudes which increases the red blood cell count in their blood hence the amount of oxygen they can store and the red blood cells also undergo a change and increase their effectiveness at supplying the oxygen to the mitochondria in the cells to power the muscles, which as i'm sure all you "experts" are aware is used in great quantites in long distance running as its a highly aerobic activiity, as opposed to sprinting which is anaerobic
Plenty of European long distance athletes will travel to high altitude training camps before big events to gain the same advantage, but to use this advantage they usually have to compete within a couple of weeks on returning to low altitudes before the effect wears off.
Blacks are crap swimmers because of their bone to muscle ratio.
If you get the chance watch some black men putting jackets on and then watch some white men doing the same.....notice anything ?
still, you dont have to take my word for it, do some research.
Ps: If you get the chance watch some black men putting jackets on and then watch some white men doing the same.....notice anything ?