Saunas improve cardiovascular performance.
In the high temperatures of a traditional or infrared sauna, skin heats up and core body temperature rises.In response to these increase heat levels, the blood vessels near the skin dilate and "cardiac output" increases. Medical research has told us that the heart rate can rise from 60-70 bpm (beats per minute) to 110-120 bpm in the sauna (140-150 with more intensive bathing), and can often sink to below normal after the cooling off stage. With regular sauna useage, we not only train our heart muscles and improve the heart rate/cardiac output, but we also help the body's regulatory system.Even more cardiovascular conditioning takes place when the sauna bathing is taken in multiple "innings”, with sessions in the sauna separated by a cool shower or a quick dip into a cool pool or lake. Each time you rapidly change temperature (from hot to cool or vice-versa), your heart rate increases by as much as 60%, which is very comparable to the increase experienced during moderate exercise..
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