The blog
Sauna science,
explained honestly.
There's a lot of sauna advice out there, and it's hard to tell what's backed by research and what's just confident. These are plain-English reviews of the actual studies: what they found, what they can't prove, and how to see any of it in your own numbers. Every figure links to its source, so you can always check.
The science, in plain English
June 2026
How long should you stay in a sauna?
Around 15–20 minutes, but the interesting part is what the Finnish longevity studies actually measured: a 14-minute average, a 19-minute threshold, and 45 minutes a week. Frequency beats a long sit.
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Gear guide
June 2026
Can you bring your phone, AirPods, or Apple Watch into a sauna?
What Apple, Whoop, and Oura officially say, device by device: the real temperature ratings versus an 80°C sauna, and how to track sessions without cooking your gear.
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The science, in plain English
June 2026
Sauna before or after a workout?
The research order is workout first, sauna after. What an 8-week randomized trial found when heat was added to training, and what a 26-year cohort says about combining both.
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The science, in plain English
June 2026
Does the sauna really help you live longer?
The two famous Finnish studies (2,315 men over 20 years, then a follow-up including women), explained simply, with the catch the headlines skip.
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Comparison
June 2026
The best sauna apps of 2026, compared honestly
Sauna & Cold Plunge Tracker, HotLog, GoPolar, and Sauna Score compared: in-session tracking vs. session diaries vs. outcome attribution, with links to every listing.
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Reading about it is step one.
Seeing it in your numbers is step two.
Sauna Score reads the sleep, heart-rate, and recovery data your devices already collect, and shows you whether the practice is moving your numbers — honestly, with the uncertainty included.