For deliberate cold exposure, *it doesn’t matter how you get cold as long as it’s uncomfor

Well SupportedImmersion in cold water up to the neck is more effective for metabolic benefits than cold showers or cold air exposure.

Well SupportedA minimum of 11 minutes of cold exposure per week, divided into 2-4 sessions, is recommended, and the timing does not matter.

Well SupportedDeliberate cold exposure is effective as long as it is uncomfortable but safe, with water submersion to the neck, limbs, feet, and hands being a common method in studies.

Partially SupportedAndrew Huberman ends cold exposure sessions with heat if it is close to bedtime and he wants to sleep well.