A new, long-term study over 14 years, published in the journal BMC Medicine, found that visiting a sauna two to three times weekly was associated with a 25% lower risk of dying from cardiovascular disease compared to hopping in once per week. (This was after taking into consideration factors like physical activity, socioeconomic status, and cardiovascular risk factors.) For those who went into a sauna four to seven times weekly, that risk fell by 77%. What’s more, researchers also found that the longer people spent in the sauna, the better it was for their hearts.
Sauna going is a popular health practice in Scandinavia, so it’s no surprise that the researchers were from the University of Eastern Finland. Sauna bathing, as it’s called, has been linked to a lesser risk of high blood pressure, suffering a stroke, and developing respiratory diseases and dementia. (Traditional saunas feature dry air with a humidity level of 10 to 20% and heated to at least 86 degrees Fahrenheit, and people usually spend five to 20 minutes bathing each time they go, the researchers point out.)
Those are big promises for simply sitting in a hot room, but it's not the first time they’ve been made. Previous research has shown that sauna goers had healthier hearts—in men. This new study is important because about half of the participants were women (51.4%!). And, it goes without saying, women are not tiny men, so it’s important for scientific research to use female subjects as well.
Saunas may keep your brain sharp
In a study of middle-aged Finnish men, heading to a sauna two to three times a week lowered odds of dementia and Alzheimer’s disease by 22% and 20%, respectively, compared to once weekly, per 2017 research in the journal Age and Aging. Turns out, what’s good for the heart may be good for the brain: Improvement in blood vessel function, lowered blood pressure, and reduced inflammation may also preserve cognitive resources.
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