08/25/2026
One of the most interesting findings in sauna research comes from a large Finnish cohort study that followed more than 2,000 middle-aged men for over 20 years.
Those who used the sauna 4–7 times per week had a ~40% lower risk of all-cause mortality compared with those using it once per week.
Why might this be?
Regular sauna exposure creates a form of controlled physiological stress—often referred to as hormesis. Heat exposure increases heart rate, promotes vasodilation, and places temporary demands on the cardiovascular system that may help support cardiovascular function over time.
Frequent sauna use has also been associated with lower risks of cardiovascular and other health outcomes.
The findings are compelling—and they add to a growing body of research suggesting that regular heat exposure may be a valuable addition to an overall healthy lifestyle.