Originally Posted by MrDigital
It's not exactly "your" idea. There have been numerous studies done on this and none of them are accepted because of the political consequences. Blacks are the best at physical activity but are below average intelligence, asians are smart but small, whites are somewhere in-between, etc, etc.
Is it all true? Probably. But even within the races there are differences, as you pointed out earlier with your muscle type differences. We've all adapted in different ways.
East Africans had to go further for their food (because it's a lot drier and their food sources migrate) so they adapted to long running whereas West Africans live in a much different climate, where food is more plentiful and thus have adapted to short powerful bursts. Asians have a diet low in meat, proteins and other amino acids and are thus physically small, but those same "brain foods" have made them more mentally active. And so on.
It's no different than any other animal group. We all adapt to the environment we live in.