Andrew Huberman· PhD
You won't need nearly as much coffee after spending three minutes in 30 degree water.
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The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
You won't need nearly as much coffee after spending three minutes in 30 degree water.
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Immediately after cold exposure you get a rush of sympathetic drive.