Cold / heat Moderate evidence

Traditional dry sauna

Hot room, 15–20 minutes, two or three times a week.

The protocol with the best observational longevity story. Heat is the point, not gadgets inside the box.

How to use

80–90°C, 15–20 minutes, cool down, hydrate. Sit lower if dizzy.

Details

Temperature range
80–100°C typical
Duration
15–20 minutes
Benefits
Cardiovascular conditioning, Relaxation
Contraindications
Unstable angina, alcohol, fainting history.

Editorial rating ★ 4.8

Do this before you buy a $8k toy.

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