Bryan Johnson· Author
Fertility markers dramatically improved.
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The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
Fertility markers dramatically improved.
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Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
Also, I'm able to ice my boys and maintain top level fertility markers whereas that's harder to do in hot water.
Sauna coincided with my fertility markers being at an all-time high. I have more total and motile sperm than 99.6% of men of any age, including men under 25.
So, saunas is not underwater. It's not submersion, but sauners are you're in a you're in a hot room. You you you're going to it's going to affect it. And I would say the effect is one quarter to oneird as profound as a hot bath or submersion.
4–7 sauna sessions per week, 20 minutes at 80°C+, reduce cardiovascular mortality risk by 40% over a decade.
Regular sauna use raises BDNF and improves verbal memory in older adults.
Sauna protocols only generate the longevity effect when sessions exceed 30 minutes.
Hot-tub bathing yields cardiovascular benefits comparable to traditional Finnish sauna at matched core-temp dose.