" And the cost of those injuries? Fatal disease in epidemic proportions. “Humans really are obligatorily required to do aerobic exercise in order to stay healthy, and I think that has deep roots in our evolutionary history,” Dr. Lieberman said. “If there’s any magic bullet to make human beings healthy, it’s to run.” Magic bullet? The last time a scientist with Dr. Lieberman’s credentials used that term, he’d just created penicillin. Dr. Lieberman knew it, and meant it. If running shoes never existed, he was saying, more people would be running. If more people ran, fewer would be dying of degenerative heart disease, sudden cardiac arrest, hypertension, blocked arteries, diabetes, and most other deadly ailments of the Western world. That’s a staggering amount of guilt to lay at Nike’s feet. But the most remarkable part? Nike already knew it. In "

― Christopher McDougall , Born to Run: A Hidden Tribe, Superathletes, and the Greatest Race the World Has Never Seen