Objectives. To study physiological, therapeutic and adverse effects of sauna bathing with special reference to chronic diseases, medication and special situations (pregnancy, children). Study design. A literature review. Methods. Experiments of sauna bathing were accepted if they were conducted in a heated room with sufficient heat (80 to 90ºC), comfortable air humidity and adequate ventilation. The sauna exposure for five to 20 minutes was usually repeated one to three times. The experiments were either acute (one day), or conducted over a longer period (several months). Results. The research data retrieved were most often based on uncontrolled research designs with subjects accustomed to bathing since childhood. Sauna was well tolerated and posed no health risks to healthy people from childhood to old age. Baths did not appear to be particularly risky to patients with hypertension, coronary heart disease and congestive heart failure, when they were medicated and in a stable condition. Excepting toxemia cases, no adverse effects of bathing during pregnancy were found, and baths were not teratogenic. In musculoskeletal disorders, baths may relieve pain. Medication in general was of no concern during a bath, apart from antihypertensive medication, which may predispose to orthostatic hypotension after bathing. Conclusions. Further research is needed with sound experimental design, and with subjects not accustomed to sauna, before sauna bathing can routinely be used as a non-pharmacological treatment regimen in certain medical disorders to relieve symptoms and improve wellness. (Int J Circumpolar
In summary, sauna baths are well tolerated and pose no risk to healthy people from infancy to old age, including healthy women in their uncomplicated pregnancy. The normal sauna bath, with moderate cool-off phases, increases the cardiac work load about as much as a brisk walk. It has been well established that the sauna bath, no matter what the cool-off type, does not pose any circulatory risk to healthy people. Cardiovascular patients with essential hypertension, coronary heart disease or past myocardial infarction, who are stable and relatively asymptomatic in their everyday life may also take sauna baths without undue risk. As a rule of thumb, if a person can walk into a sauna, he or she can walk out of it. Misuse and abuse of the sauna are another matter.
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