270. Understanding Depression IV: The Root Cause

The OptimalWork Podcast

#270: In this episode, Kevin and Sharif explore a bold new way to understand depression—not as a simple chemical imbalance, but as what Kevin calls a “phobia of adenosine.” Drawing on neuroscience and behavioral psychology, Kevin explains how our brains rely on a natural rhythm of intensity and rest, and how losing that rhythm leads to burnout, lethargy, and despair. The discussion connects deep biological mechanisms—adenosine, dopamine, cortisol, and dynorphins—to everyday experiences of tiredness, motivation, and meaning. In this episode, the groundwork has been laid for next week’s episode which will explain how to restore vitality through a rediscovery of “good tired”: meaningful effort and healthy rest.

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