Sauna Gold Coast

Twenty minutes in the sauna places a load on the heart comparable to moderate aerobic exercise. A 2019 study published in Complementary Therapies in Medicine measured heart rate and blood pressure during a 25-minute sauna session and found the cardiac load corresponded to moderate physical exertion of about 60 to 100 watts. Your heart rate can rise into the range of 100 to 150 beats per minute, your blood vessels widen, and oxygen-carrying blood moves towards the skin and limbs to regulate your internal temperature.

The longer-term picture comes from Finland. A prospective cohort study published in JAMA Internal Medicine followed 2,315 middle-aged men for a median of 20.7 years and found that more frequent sauna use was associated with fewer cardiovascular deaths, with the strongest effect among men using a sauna four to seven times per week. We’ve broken down the wider picture of whether saunas are good for cardiovascular health in a separate piece.

When your core temperature rises, your cells produce heat shock proteins. These act as molecular chaperones: they help repair misfolded or damaged proteins inside cells and protect cells from stress-related damage, a response that overlaps with how the body recovers after training. In practice, this supports post-workout muscle recovery and can ease soreness when you’re moving between training programs. The increased blood flow to the muscles also helps clear metabolic waste from the tissues. For a closer look at the muscle side, see our guide to using a sauna for post-workout recovery.

Heat shifts your nervous system. Noradrenaline rises during a session, roughly doubling in studies of sauna bathers, while the cortisol response is more variable and depends on the temperature and length of the exposure. As you cool down afterwards, the parasympathetic nervous system takes over, and many people find a sauna taken in the late afternoon is followed by better sleep.