0:36

In this short explanatory segment, the speaker outlines how testosterone levels are regulated specifically during REM sleep. During this phase, testosterone contributes to resetting threat calibration systems and stabilizing reward responsiveness mediated by dopamine. The speaker emphasizes that if either REM sleep or testosterone regulation is disrupted, the recalibration process fails, leading to a double‑edged problem where threat perception and reward processing become dysregulated. The core claim is that REM sleep uniquely provides the physiological window for testosterone to perform these regulatory functions.

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