The human body is the product of millions of years of evolution, and the human race took a unique route in nature: bipedal locomotion. Not even our closest living primate relatives can walk upright for long, but the human form has the right skeleton and muscle coordination to walk on two legs for a lifetime. This comes from our early ancestors’ hunter lifestyle, and even today, the human body is built for running and exercise. Our skeleton features an S-shaped spine, arched feet, long leg bones, and an upright pelvis, though this does come at a cost. Walking upright and fighting gravity so acutely wears out the spine and back…
