A
“Regular sauna use reduces cardiovascular mortality”
Multiple long-term prospective studies from the University of Eastern Finland (Kuopio Ischemic Heart Disease study, 20+ years, 2,300+ men) show a dose-dependent reduction in fatal cardiovascular events with 4–7 sauna sessions per week.
⚠ CaveatObservational data — cannot prove causation. Participants were middle-aged Finnish men; generalization to other populations is plausible but not confirmed.
JAMA Internal Medicine · 2015 · PMID 25705824
Association between sauna bathing and fatal cardiovascular and all-cause mortality events
Finding: 4–7 sessions/week: 50% lower CV mortality vs 1 session
American Journal of Hypertension · 2017 · PMID 28633297
Sauna Bathing and Incident Hypertension: A Prospective Cohort Study
Finding: 46% lower hypertension risk at 4–7 sessions/week