Bryan Johnson· Author
Improved heat tolerance: The body becomes better at handling heat, leading to a lower core body temperature (offering metabolic advantages) and an increased capacity for efficient sweating in hotter climates.
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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.
Improved heat tolerance: The body becomes better at handling heat, leading to a lower core body temperature (offering metabolic advantages) and an increased capacity for efficient sweating in hotter climates.
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Improved heat tolerance: The body becomes better at handling heat, leading to a lower core body temperature (offering metabolic advantages) and an increased capacity for efficient sweating in hotter climates.
So your body starts to sweat at a lower core body temperature to cool yourself down. All these other physiological changes start to happen. Your heart rate variability, you know, improves. All those things happen when you're adapted.
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.
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Hot-tub bathing yields cardiovascular benefits comparable to traditional Finnish sauna at matched core-temp dose.