Most of us were told that running is the purest path to leanness, heart health, and a long life. Mark Sisson spent a career as an elite endurance athlete, becoming a sub-2:18 marathoner and top finisher at Ironman, before his own body forced him to question all of it. In this conversation, he makes the case that – for many people – "chronic cardio" quietly breaks the body down more than building it up, and that the movement your body is actually engineered for is one that we have stopped respecting: walking.
In this episode, we get into:
The broken promises of running for exercise, including injury rates, the fat loss myth, hormonal dysfunctions, and more
Real aerobic training and why the fastest marathoner on earth trains 80% of the time at an easy, conversational pace
Why persistence hunting was never a steady-state jog, but more of an alternating walking-climbing-sprinting endeavor
How modern shoes "brace and encase" our feet, dulling our connection to the ground and setting up injuries
What a fitness routine looks like when it aligns with evolutionary biology
Mark is 73 and, by his own account, fitter than he's ever been. This makes him one of the rare voices on aging who is living the message in real time. If you want to understand a sustainable framework for fitness and longevity, this episode will clarify how you think about it.
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