2. We have big butts
And we cannot lie (sorry, couldn’t help it). Take a look at the runners in animal kingdom and you won’t see too many copious derrieres. Too bad for them, because our booties, specifically our gluteus maximus muscles, are uniquely shaped to help in propelling the body forward while running. Need further proof? Even runners with prosthetic limbs can go the distance because of gluteal strength.
3. We’re genetically programmed to run
Most scientists (including Harvard anthropologist Daniel Lieberman, who published an oft-quoted study in 2007) believe that our ancestors were daytime hunters and scavengers. In other words, those guys had to get to the animal faster than any other hunter, or else there would be no food for dinner. What’s the link between those old guys and you? Um, have you heard of Darwin?