Did you know this? Just two 15-minute dry sauna sessions a day increase growth hormone release by 500 percent! Saunas also help your immune system fight infections and cancer and reduce inflammation. Any type of heat therapy works, including saunas, infrared saunas, steams, hot baths, hot springs, and even hot yoga! Finding a way—even just a hot bath—to regularly boost your temperature is an easy, cheap, and rejuvenating strategy to improve your health span and address the root causes of aging. DOI:10.2203/dose-response.003.04.008 DOI: 10.1001/jamainternmed.2014.8187