Saunas Lower Your Heart Rate More Than Exercise
Summary
Terra Research analyzes ~59,000 daily records from 256 wearable users to compare sauna days with non-sauna days. The results show a nighttime minimum heart rate about 3 bpm lower on sauna days, even after controlling for activity, with notable differences between men and women and across menstrual cycle phases. The study uses paired t-tests with FDR correction and reports effect sizes (Cohen’s d).