#76 - When the brain takes over the body's physiology

Why do we actually stop when we feel exhausted? And why do we still underestimate how big a role the brain plays in our physical performance?

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In this episode, we delve into the surprising truth about fatigue: that it's rarely the muscles that give up first, but the brain that decides when enough is enough. We examine the Central Governor Theory and its critics, and reveal why our perception of effort is often the real limitation, not our physiological capacity.

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Through three fascinating studies in cycling, running and swimming, we see how pure mental fatigue alone can lower performance, even when the body is fully capable of continuing. No changes in heart rate, lactate or physiology. Just a brain telling you it feels harder.

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