A groundbreaking Finnish study reveals that frequent sauna sessions may significantly reduce stroke risk. Originating in Finland, where saunas are a cultural staple, this research followed 1,628 stroke-free participants with an average age of 63 for about 15 years. They reported sauna frequency and lifestyle habits like exercise and alcohol intake, while baseline tests measured cholesterol, blood pressure, and other stroke risk factors.
During follow-up, 155 strokes occurred. Stroke rates per 1,000 person-years were 8.1 for once-weekly users, 7.4 for two-to-three times weekly, and just 2.8 for four-to-seven times weekly. Those using saunas four to seven times a week showed a 60% lower stroke risk compared to once-weekly users—even after adjusting for variables like high cholesterol, smoking, diabetes, and physical activity.
This study examined traditional Finnish saunas; findings may not extend to infrared therapy, steam baths, or hot tubs. Caution is advised for recent heart attack patients, those with unstable angina, or older adults with low blood pressure.
