What motivates someone to run more than 3,000 miles around a single city block? Transcendence. Just ask the entrants in the Sri Chinmoy Self-Transcendence 3100 Mile Race, which takes place every year in Queens, New York. In order to get to the finish line ahead of the cutoff, competitors must complete the equivalent of two marathons a day for 52 days in a row. As physically grueling as that sounds, the greatest challenges are mental. In this replay from our Sweat Science series from a few years back, we investigate the surprising tools we use to convince our bodies to do the seemingly impossible.