I mostly agree with this theory. But I would argue that this model applies to humans before we migrated out of Africa. Certain human races have dramatically hig

I mostly agree with this theory. But I would argue that this model applies to humans before we migrated out of Africa. Certain human races have dramatically higher athletic performance while others have lower performance. Take the Olympic performance in track and field between Jamaicans and the Chinese. You will note that despite a targeted program designed to win as many gold medals as possible China did incredibly poorly in track. I would argue that this is evidence for the fact that while the human foot may be vestige designed for long distance running, other factors such as cardiovascular endurance and physical strength have already begun evolving away from this design. The change is so recent that I believe the degree of this divergence depends on your race.