🧬 One sauna session temporarily boosts the flow of immune cells in the body
A recent study conducted in Finland indicates that spending 30 minutes in a sauna session temporarily enhances the movement of white blood cells, or what are known as white blood cells, within the blood. These cells play a key role in detecting and fighting pathogens that may threaten human health.
These findings add a new dimension to understanding the relationship between hot climates and their effect on the immune system, an area that is seeing growing interest in health and medical scientific research.
🧪 How does a sauna session affect white blood cells?
The study showed that a 30-minute sauna session increases the number of white blood cells circulating in the bloodstream, and this increase is not limited to one type but includes all common types of these cells.
White blood cells include a group of immune cells such as neutrophils and lymphocytes, both of which are vital in combating infection. Notably, the levels of these cells returned to normal rates within about half an hour after the sauna session ended.
Among the procedures taken by the study participants was cooling under a cold shower midway through the session, a common tradition in Finnish saunas that may help enhance the immune effect.
🧠 Explaining the movement of white blood cells during sauna use
Researcher Ilkka Heinonen, a researcher at the University of Turku, explains that a sauna session may stimulate white blood cells to move out of their storage sites in the body’s tissues into the bloodstream. This temporary process allows these cells to move more freely in the blood and travel throughout the body, improving the body’s ability to detect foreign bodies and respond quickly to infection.
This temporary increase in white blood cells is similar to what happens during physical exercise, where bodily movement increases the number of these cells in the blood to improve immune surveillance.
🩺 Interaction with inflammatory molecules: temperature-related changes
The research team also examined the effect of sauna sessions on cytokines, molecules that play a role in coordinating immune system activity and regulating inflammation within the body.
Although changes in the levels of these molecules during the session were modest on average, individual responses were found to be clearly linked to the extent of the body temperature rise during the sauna period.
In commenting on these results, Professor Jari Laukkanen from the University of Eastern Finland stated that the relationship between rising temperature and immune responses expressed through cytokines opens a window into understanding how the body reacts to different thermal changes. No similar association was observed between changes in white blood cell counts and temperature increase.
🌱 Long-term effects and regular sauna use
Although a single sauna session clearly stimulates the immune system by increasing white blood cells, the long-term effects of this practice on human health remain unclear for now.
The study included 51 participants with an average age of 50 years, and focused on the immediate changes that followed a single sauna session.
Despite the well-known links between regular sauna use and a number of previously reported health benefits, current research does not allow us to conclude whether these temporary immune changes translate into lasting improvements in immune function or overall health.
🧪 Research summary
- One sauna session temporarily increases the number of all white blood cells in the bloodstream.
- neutrophils and lymphocytes return to normal levels within 30 minutes after the session.
- Changes in cytokines are linked to how much the body temperature rises.
- The increase in white blood cells enhances the body’s ability to monitor the immune system and confront inflammation.
- Long-term effects still need broader study and repeated measurements with regular sauna use.
🧬 What does this mean for sauna benefits and health care?
These findings add new scientific evidence about the ability of sauna sessions to temporarily mobilize immune cells in the blood and enhance the body’s techniques for detecting pathogens. Combined with practices such as cooling after sauna use, this method may play a complementary role in improving the immune response in the short term.
However, it should be emphasized that this research does not offer specific therapeutic or health recommendations, but rather opens the door to more studies examining the effects of regular sauna use on the immune system and human health in general.
Therefore, benefiting from sauna use as one health practice remains part of an integrated framework for maintaining health and preventing disease, while it is important to consult specialists about any special effects or medical conditions affecting the patient.
📚 Related articles
Discover more from Mohdbali
Subscribe to get the latest posts sent to your email.
