The sauna bath with its alternating application to the body of heat an
d cold, exerts a positive effect on numerous bodily functions includin
g the skin, heat regulation, cardiovascular system, organs of respirat
ion, nervous system, and the endocrine system. Regular sauna baths (th
ronghout 4-6 weeks) lead to a health-promoting long-term effect. In th
e meantime, not only has this empirical observation been confirmed by
experimental and epidemiological studies, but the underlying mechanism
of action involved has also been explained. As a result of habituatio
n to the intensive alternating thermal stimulation of the organism, th
e sauna user develops a greater resistance to such diseases as colds,
'flu, etc. Another confirmed effect of regular sauna baths is the stre
ngthening of the unspecific immune system. This reduction in the body'
s susceptibility to infection and the enhancement of its defence mecha
nisms are brought about by adaptation of the organism to the alternati
ng hot/cold stimuli, supported by a direct influence on unspecific imm
unological parameters. Since the sauna bath is a relatively simple the
rapeutic hydrothermal application with few side-effects, it is highly
practicable both in prophylactic and therapeutic medicine for preventi
ng diseases of the airways, hypotensive dysregulation and other condit
ions. Note should be taken of the contraindications.