Sauna
Sauna enthusiasts laud the health benefits of "sweat baths," attributing them with healing, preventative, and cleansing properties. Basically, what happens to the body during a sauna is quite simple — your metabolism and pulse rates increase, your blood vessels become much more flexible, and your extremities benefit from increased circulation. Physical fitness fans will recognize that some of these changes can also be achieved through strenuous exercise. Not to say that a sauna would put you in excellent physical condition without moving a muscle (don't some of us wish!), but that it brings about the same metabolic results as physical exercise.