Why it matters
Deliberate cold is hormetic stress. Enter on an exhale, exit with dignity; HRV and stress tolerance rise with practice.
Start today
Cold face splash → cold-end shower (60 s) → ice bath, building to the 19-Minute Protocol: 19 minutes of deliberate cold a week.
How we measure it
HRV recovery after exposurecold tolerance ladder
Measured in the Medicine 3.0 baseline and re-tested once the protocol has run.
The body it belongs to
The emotional body — feelings in motion. Blue Mind and parasympathetic calm.
One point is a practice. Twenty-one is a protocol.
Open the tracker, score yourself honestly, and bring the number to the initial consultation.