Love being in the sauna? The effect on the immune system you should know about

A new study found that spending 30 minutes in a sauna at about 73°C causes a temporary increase in white blood cells, similar to physical exercise. The study was published in the journal Temperature and included 51 adults. Researchers are still investigating the long-term significance.

A new study published in the journal Temperature found that spending 30 minutes in a sauna at about 73°C causes a temporary increase in white blood cell levels, including neutrophils and lymphocytes. The study involved 51 adults with an average age of 50, from whom blood samples were taken before, immediately after, and again 30 minutes after the sauna. Cell levels returned to normal after half an hour. The researchers hypothesize that heat stress triggers a response similar to 'hormetic stress,' akin to physical exercise or cold water immersion. The article notes additional benefits such as increased heart rate and vasodilation, but emphasizes that the sauna is not a substitute for physical activity or medication, and is not recommended for people with severe heart problems, very low blood pressure, severe dizziness, pregnant women, and the elderly. The study adds to the understanding of the health benefits of saunas, but further research is needed.