Sauna bathing is one of the most consistently associated habits with lower mortality and disease risk in longevity research. The strongest evidence comes from Finland, where sauna is part of daily life.Men who used the sauna 4-7 times a week had around 40 % lower risk of premature death compared to those who used it less often.The benefits likely derive from improved cardiovascular function, reduced blood pressure, better vascular compliance, stress resilience, and heat-shock protein activation.While sauna cannot replace exercise, diet and sleep — it represents a low-risk, high-potential complement in a healthy lifestyle.
