A YouTube interview (uploaded by Ben Greenfield) featuring Mark Sisson speaking about maintaining health, fitness, energy, and muscle mass at age 71. In this excerpt Sisson frames his approach as a set of learned practices (not "hacks"), emphasizes preserving muscle while avoiding overtraining, and warns that steady running can be catabolic—potentially reducing muscle and altering body composition even if scale weight stays the same.
71
February 2, 2025
You know, because I'm 71 now and, and I should mention, folks, if you don't follow Mark, he's one of the most like ripped fit 71 year olds on the planet. Well, thanks. I try. And the irony here is that a lot of the stuff I've learned have been you guys call them hacks. I don't like that term. But you know, things I've learned over the years that have allowed me to maintain my health and my fitness and my energy and my muscle mass all at the same time without having to make too many massive sacrifices along the way. Whether those were sacrifices in diet or sacrifices in overtraining and things that I thought I had to do to be as Ali G. Would say, well, fit. Running is catabolic. It tears muscle tissue down. So over time, somebody, a woman might say, well, I'm 155 and I've stayed at 155 for, you know, the last, the last year since I've been running, she's lost some muscle mass and she's gained some body fat. Her weight stayed the same, but her body composition has changed.
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