A single sauna session sends immune cells surging
A Finnish study found that a 30-minute sauna session temporarily increases the number of circulating white blood cells in the body. This response is similar to the immune system's reaction to physical exercise.
Why it matters
Understanding how heat exposure affects immune function could provide insights into non-pharmacological ways to support the body's defense mechanisms.
A new Finnish study suggests that spending time in a sauna can temporarily move more white blood cells into the bloodstream. These immune cells help the body detect and respond to pathogens and disease.
Researchers found that a 30-minute sauna session increased the number of every type of circulating white blood cell. Participants briefly cooled down under a cold shower halfway through the session.
Levels of neutrophils and lymphocytes, two important parts of the immune system, returned to their usual levels within about 30 minutes after the sauna ended.
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