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#133 Andrew Huberman: The Science of Small Changes
The Knowledge Project with Shane Parrish
Thermostat in the brain and cold shower dopamine ðŸ§
Taking a cold shower in the morning can boost metabolism and body heat by stimulating the release of adrenaline, cortisol, and dopamine. The preoptic area of the brain acts like a thermostat, increasing body temperature when exposed to cold water but not to the point of hypothermia. Cold water exposure can lead to a 2.5x increase in dopamine release, similar to the effects of cocaine but with a more sustained impact. Ideally, submerging in cold water up to the neck or enduring a cold shower that is uncomfortably cold yet safe for about 1-3 minutes is recommended. Individuals have different cold tolerance levels, so the temperature should prompt a strong desire to exit. The optimal duration for cold exposure is 11 minutes per week.
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