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In this episode Rhonda talks about how heat stress from using the sauna makes the body more resilient to the stresses of aging, possible reasons why one study associated sauna use with up to a 40% lower all-cause mortality as well as a 50% lower cardiovascular disease related mortality, how it enhances athletic endurance, staves off muscle atrophy, improves regrowth of muscle after disuse, and some of the profound effects on the brain, including the growth of new brain cells, improvement in focus, learning, and memory, and even potentially ameliorating depression and anxiety. She also talks about how BPA, PCBs, phthalates, and other metals are excreted through sweat. In addition, she addresses some practical applications like temperature and duration in the sauna, the difference between a dry, wet and infrared sauna, sauna timing, as well as other forms of heat stress such as steam showers, hot baths, and hot yoga.