Emerging research highlights the health benefits of sauna use. According to a new study, spending just 30 minutes in a sauna triggers a notable increase in circulating white blood cells, which play a critical role in fighting infections and illnesses.
When white blood cells are released into the bloodstream, as also happens during physical exercise, the body is actively enhancing immune monitoring throughout the system and reinforcing its ability to defend against threats.
A total of 51 adults, with an average age of 50, participated in the research. Each person experienced one 30-minute sauna session at 73°C and low humidity that included a short cold shower break halfway through. During the session, they were allowed to drink half a liter of water.
White blood cell count rose significantly right after the sauna. Neutrophils and lymphocytes increased immediately but normalized within 30 minutes. Rather than generating new immune cells, the sauna induces a temporary redistribution of existing white blood cells from tissue storage sites into the circulating bloodstream. This means extra white blood cells shift from tissues into the blood before returning afterward.
The mobilization of white blood cells into circulation appears beneficial. As the cells move out of their storage sites, they become better able to patrol tissues throughout the body and respond quickly to infections and illnesses.
Although regular sauna use has been associated with a range of health benefits, these new findings may offer a glimpse into the biological processes behind them.
To view the original scientific study click below:
Acute Finnish sauna heat exposure induces stronger immune cell than cytokine responses
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