Winnie Lim

In 2013, Freund published a telling study on the pain tolerance of ultra-endurance runners competing in the TransEurope Footrace, an epic pain-fest in which participants covered 2,789 miles over 64 days with no rest days. He asked eleven of the competitors to dunk their hands in ice water for three minutes; by the end, they rated the pain as about 6 out of 10 on average. In contrast, the nonathlete control group gave up after an average of just 96 seconds when their pain maxed out at 10;