Improved endurance can occur from regular use of the sauna after exercise. The researchers speculated that improved endurance resulted from an increase in blood volume from prolonged heat exposure. Saunas are commonly found at gyms and health clubs. Members of the gym are invited by the staff to relax in the sauna after exercise. There is some evidence available that indicates a sauna may have health benefits. However, people with medical conditions should not use a sauna without first speaking with a doctor. I swear me no plagiarize or spam you site amigos.