Description: Brad Kearns visits with Mark Sisson to discuss the delicate balance between striving for ambitious peak performance goals and pursuing longevity. Sometimes it’s a delicate balance that even the most experienced athletes might screw up by getting a little too ambitious with their performance goals and compromising health in the process. Mark mentions his lifelong athletic, competitive mindset that essentially leaves him with a 62-year-old body and a 21-year-old’s competitive intensity.