What are the best protocols for cold exposure?

The best cold-exposure protocol depends on your goal: choose an uncomfortable but safe level of cold, start conservatively, and build up gradually rather than pushing for the coldest or longest exposure. 1

• General exposure: Use cold water immersion when available, or a cold shower; aim for a challenging, safe exposure. A practical weekly target discussed is about 11 minutes total, divided across sessions, but consistency and safety matter more than rigidly meeting a number. 2 3
• Mental resilience: Use regular cold showers or immersion to practice staying calm and mentally clear while your body is stressed. You can gradually work through the urge to get out, while keeping the exposure safe. 4 5
• Muscle growth and recovery: If strength or hypertrophy is your priority, avoid cold-water immersion for about four hours after training. After high-intensity exercise, cold immersion may help reduce soreness and improve perceived recovery. 6 7
• Metabolic benefits: Follow the Søberg principle: finish with cold and rewarm naturally rather than going straight to a hot shower or sauna. To encourage shivering, alternate cold exposure with brief periods out of the water or shower, then return to the cold; don’t stay in until you become dangerously cold. 8 9
• Ways to do it: A plunge, cold shower, or cold water outdoors can work; for the described fat-loss approach, the focus is reaching a genuine shiver through repeated cold-and-rewarming cycles. 10 11