30–60 seconds cold at the end of a warm shower is the compliance champion.
Cold / heat
Limited evidence
Contrast shower
Free heat/cold if you have a tap.
How to use
Finish warm showers with 30–60s cold. Face the water, slow breathing.
Details
- Temperature range
- As cold as the tap
- Duration
- 30–90 seconds
- Benefits
- Alertness, Habit building
- Contraindications
- Raynaud’s, serious heart disease — be cautious.
Editorial rating ★ 4.5
Best ROI in the category.
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