2min chapter

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#59: How To Crush Your Running Goals, With Coach Jimmy Dean Freeman

The Extramilest Podcast

CHAPTER

Putting Your Body Through That Space

In a marathon, it's somewhere around mile 20 that we exhaust our glycogen supply. And the body goes from kind of a normal state to a ketotic state. That's where the body starts to metabolize muscle proteins for energy. It's very uncomfortable, maybe even acutely painful. For many people, that train is indeed a new and unknown.

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