Ben Greenfield, Only the Strong Survive

Published: Dec. 23, 2014, 5:59 p.m.

Ready to reach \u2018superhuman\u2019 levels of performance? Listen to Commander Mark Divine chat with renown ironman, fitness guru and biohacker Ben Greenfield, as they discuss training, 20X performance, mental toughness, the world's toughest 48-hour challenge (KOKORO) and tons more. Learn how Ben uses qualitative and quantitative measurements to fine tune his results.