Your body temperature is increased to 39ºC whilst the perspiration phase (artificial fever) produces the same effect within the body as a genuine fever, namely destruction of pathogens due to the increase in temperature.
Following heat with a cold bath relaxes the muscles and, in addition to several physiological effects such as lowering the blood pressure and stimulating the circulation, metabolism, immune system and respiration, above all also has a beneficial effect on the subjective sense of wellbeing.
Taking a sauna also helps to look after your skin and slow down skin aging; immediately after entering the sauna the skin reacts, the blood vessels dilate, the blood supply increases and after around 15 minutes the surface temperature increases to between 40 and 42 ºC; in the cooling phase the blood vessels constrict again through the use of cold water treatments (“training” of the blood vessels).
The sweating stimulated by saunaing and the repeated water treatments also have a very thorough yet gentle cleansing effect on the body; the outermost layer of the skin swells, loosening dead skin cells which can be easily washed away. In the case of very dry skin, the structure is improved by activating the perspiration glands and water deposits in the skin’s outermost layer.