New Study Reveals 30-Minute Sauna Sessions Trigger Temporary Immune Response
A new study reveals that a 30-minute sauna session triggers a temporary spike in white blood cells. Researchers highlight potential immune benefits alongside cardiovascular advantages.
A recent study published in the journal Temperature reveals that spending just 30 minutes in a sauna may trigger a unique immune response in the human body. Researchers found that a short session in high heat leads to a temporary increase in white blood cells.
As part of the study, 51 adults with an average age of 50 spent 30 minutes in a sauna heated to approximately 73 degrees Celsius. Blood samples were collected before, immediately after, and 30 minutes following the sauna session. The results demonstrated a temporary spike in all measured white blood cell types, including neutrophils and lymphocytes, which act as the body's primary defense against infections. However, researchers noted that cell levels returned to baseline within half an hour.
While the exact mechanism remains under investigation, experts suggest that the thermal stress acts as a mild physical challenge, stimulating the nervous system to release stored white blood cells into the bloodstream. This process resembles hormetic stress, similar to the physiological response triggered by exercise or cold water immersion.
Beyond potential immune activation, sauna use accelerates heart rate and dilates blood vessels, mirroring the cardiovascular effects of brisk walking. Previous studies have linked regular sauna sessions to lower blood pressure and improved heart health. Nevertheless, health experts emphasize that saunas cannot replace physical activity or prescribed medication and advise pregnant women, the elderly, and individuals with severe cardiovascular conditions to avoid them.
