Dr. Jari Laukkanen, a cardiologist and scientist, explores the positive effects of sauna use on cardiovascular health, blood pressure, heart rate, and mood. Sauna use increases growth hormone, improves response to exercise, and activates heat shock proteins that help keep the brain healthy. The podcast also discusses the dose-dependent effects of sauna use on mortality rates and its potential role in preventing cardiovascular diseases and Alzheimer's. Finnish sauna culture and the benefits of adding cold-water immersion to the experience are also mentioned.