Deliberate cold as stress training: the 11-minute weekly dose
September 29, 2026 · 30 min read
Susanna Søberg's research sets a minimum of about 11 minutes of cold per week and advises ending on cold, Huberman explains how cold builds resilience and dopamine, Ralph Adolphs discusses ice baths as regulation practice, and Huberman frames cold and breathwork as training for bad weather. Choosing a controlled stressor teaches the nervous system to stay calm under uncontrolled ones.
The rules, numbers and steps worth keeping in front of you.
- Søberg: about 11 minutes of cold a week, over two to three days.
- Split it into dips of one to two minutes.
- Aim for uncomfortably cold, not a set temperature. 12°C water is enough.
- Søberg: it should be hard. If it is comfortable, it is no longer a strong stimulus.
- Short repeated dips beat one long soak.
- End on cold and rewarm naturally to maximize the metabolic effect.
- Huberman: cold releases the same chemicals as everyday stress.
- Staying in on purpose trains top-down control.
- Count walls: decide in advance how many urges to quit you will get past.
- Cold raises dopamine, which lifts mood for hours.
- Adolphs: after two weeks his heart rate fell on entry and road anger went flat.
- The 11-minute figure was measured for metabolism, not for calm.
- Never combine hyperventilation breathing with water.
- See a physician first with heart, blood pressure or lung conditions.
This is the short form. The full insight has every expert's reasoning, their own words and the sources.