When you head out for a run, how do you gear up? There's your smartphone, of course (gotta keep track of those miles!). Your running clothes, perhaps made out of moisture-wicking fabric. And your shoes—engineered to the smallest detail to boost your performance with every step.
But if the Rarámuri of Mexico's Copper Canyon are any indication, you don't need anything high-tech to make the most of your run. These elite long-distance runners have kept their traditions alive for centuries, and they've done it all in leather sandals.