Some like it hot, and some sweat when the heat is on. That's not a bad thing, especially when we're talking about taking a sauna. The heat in a sauna can get as high as 185 degrees Fahrenheit. {relatedarticles}It's a healthy treatment that even works for the faint of heart, although it's important to always consult with your physician first. Saunas increase the heart rate by 50 to 75 percent, providing the same metabolic boost as physical exercise. While it's no substitute for actual physical activity, it does work well in conjunction with regular workouts and healthy eating. Saunas increase the flexibility of blood vessels and increase the circulation of the blood throughout the body. This helps the body detoxify. It also benefits those individuals suffering from chest congestion and bronchitis. There are many health benefits to having a seat in the sweat box. For starters, saunas are a great stress reliever, and as we all know, stress contributes to weight gain.