The Tim Ferriss Show

WARNING: AS I’VE EMPHASIZED BEFORE, NEVER DO BREATHING EXERCISES IN WATER OR BEFORE TRAINING IN WATER. SHALLOW-WATER BLACKOUTS CAN BE FATAL. Wim Hof (@Iceman_hof) is a Dutch world record holder, adventurer and daredevil, commonly nicknamed “The Iceman" for his ability to withstand extreme cold. He is the creator of the Wim Hof Method and holds more than 20 world records. Wim is an outlier of outliers, as he routinely asks scientists to scrutinize and validate his feats. Here are just a few examples: In 2007, he climbed past the “death zone" altitude on Mount Everest (~7,500 meters) wearing nothing but shorts. In 2009, Hof completed a full marathon above the polar circle in Finland, in temperatures close to −20 °C (−4 °F). Dressed in nothing but shorts, Hof finished in 5 hours and 25 minutes. Hof holds the current Guinness World Record for the longest ice bath, now set at 1 hour 53 minutes and 12 seconds. But it’s not just cold. In 2011, he ran a full marathon in the Namib Desert without water.