Slow heat – why the sauna works
What happens in the body during a round in the sauna – and why Nordic people have known it for more than two thousand years.
The sauna is one of the best-documented habits you can keep standing in the garden. Finnish studies have followed thousands of people over several decades, and the picture recurs: regular sauna bathing is linked to better heart health and better sleep.
What happens in the body
Your body temperature rises a couple of degrees. The blood vessels widen, blood pressure falls, and the pulse works as in light exercise – while you sit completely still. Many experience it as a pause the body has been missing.
It's about repetition
The effect grows when it becomes a habit. Twice a week can be felt; more often is felt more. It's the rhythm over time, not the single bath, that counts.
The overlooked part
The sauna is one of the few places the phone is allowed to stay down. Half an hour without a screen and without notifications. That may be worth just as much as the heat.