What sauna, hot water, and cold do to the body, what the numbers mean, and who should be careful.
5 posts
When should you bathe before bed, and how warm should the water be? A practical guide to timing, temperature, core body temperature, and individual variation.
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An estimated 19,000 people a year die suddenly while bathing in Japan, most of them in winter, most of them over 65. What heat shock actually is, the official rules for avoiding it, and what the blood pressure swing looks like on a watch.
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Your watch says you burned 400 calories sitting still. It is counting your heart rate, and in a sauna your heart rate is lying to it. Here is what is actually happening and what is worth measuring instead.
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Alcohol, some medications, pregnancy, and heart or blood-pressure conditions may change whether sauna is appropriate. Learn when to skip it and when to ask a clinician.
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A sauna pushes your heart rate to 100 to 150 bpm without you moving. Here is what the research says is typical, why it happens, how to set a personal limit, and what a good recovery looks like.
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