Cold Immersion Mastery — Digital Guide

3°C is not a number. It's a decision you make before your mind can talk you out of it.

Cold Immersion Mastery breaks down the physiology of deliberate cold exposure — vagal tone, brown fat activation, dopamine regulation — into a protocol you can run tomorrow morning with nothing but ice water and a timer.

• Breath-hold and entry sequence
• Time-and-temperature progression, week 1 to week 12
• Post-plunge rewarming protocol
• Safety thresholds and contraindications