Saunas aren’t just for Scandinavians anymore—they’re becoming a global wellness obsession. In this episode, we explore why high heat is suddenly so hot, from Finland’s long-standing sauna culture to rising adoption in gyms, spas, and backyards around the world. Scientists say this ritual acts as a gentle, controlled stressor, mimicking moderate exercise and boosting circulation—and observational studies even link frequent sauna use with lower risks of heart disease and dementia. But there’s a catch: the evidence isn’t airtight. Wealthier, healthier people are more likely to be sauna regulars, muddying the research. So are saunas truly medicinal, or just relaxing? We break down what scientists know, what they don’t, and why the next big test will require far more rigorous trials.

https://www.economist.com/science-and-technology/2025/08/22/are-saunas-actually-good-for-you