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Contrast Therapy (Hot-Cold Cycling)

biohacking · medium · 1.5-2 hours/week

What is Contrast Therapy (Hot-Cold Cycling)?

Alternating between sauna/heat exposure and cold immersion in the same session to enhance recovery, circulation, and hormonal response. Combines the cardiovascular benefits of heat with the anti-inflammatory effects of cold.

Is there evidence for it?

EVIDENCEmoderate

How do you do Contrast Therapy (Hot-Cold Cycling)?

  1. 1.Start with 15-20 minutes in a sauna (174°F+/80°C+) to elevate core temperature
  2. 2.Transition to cold plunge (50-59°F/10-15°C) for 1-3 minutes
  3. 3.Repeat 2-3 rounds of hot-cold cycling in a single session
  4. 4.Always END on cold if the goal is metabolic benefit (Søeberg Principle); end on hot if the goal is relaxation
  5. 5.Perform 2-3 contrast sessions per week; hydrate with 16-24oz water throughout

How long does it take?

1.5-2 hours/week.

Is it hard to start?

medium.

Source: Dr. Susanna Søeberg (deliberate cold + heat research); Huberman Lab; Finnish sauna + avanto (ice swimming) tradition
contrast-therapy · recovery · circulation · sauna · cold-plunge · hormesis
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