The sauna of Finland is a tradition that dates back over two thousand years. The Finns attribute their endurance and longevity to the tradition of sauna.
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.
The effects of the sauna are numerous and varied. Many people experience a feeling of psychological peace and contentment as well as physical rejuvenation. Many claim that the sauna relieves the symptoms of minor illnesses such as colds, revives the muscles after tough physical exertion, and clears the complexion. The sauna experience will often leave you feeling very much alive. Your senses will be sharpened, and your tactile sensitivity heightened.
Another aspect of the sauna that needs to be considered is your mental state prior to taking one. Many people attest to the healing powers of the sauna concerning mental depression and anxiety. They say that after leaving the sauna, the mind is in a relaxed, lucid state, free of the worries of the everyday world. Also, when the body feels soothed and energized, the mind and emotions often follow suit.