It looks as if Mr Springsteen was right—baby, we were born to run:
BBC: Running 'key to human evolution'
Long-distance running may have been a driving force behind evolution of the modern human body, scientists say. American researchers said humans began endurance running about 2 million years ago to help hunt for prey, influencing the development of the human body. Previous studies have suggested running was purely a by-product of walking. But the study, published in Nature, said humans evolved big buttocks, a balanced head and longer legs to help gather food.
I'm devastated. This completely destroys my theory that our buttocks evolved as musical instruments.