A large, long-term University of Eastern Finland study revealed that frequent time spent in saunas was associated with a longer life and less cardiac-related deaths. Analyzing 2,300 middle-aged men over two decades, the researchers found that men who visited a sauna 2-3 times a week had a 24 percent lower risk of death, while those who sweated it out 4-7 times weekly had a 40 percent mortality reduction, compared with only one sauna session a week.