The physiological response of 51 middle-aged adults to a 30-minute sauna at 73˚C, with a cold shower in the middle, included a rise in white blood cells (neutrophils and lymphocytes) that persisted for 30 minutes after the sauna. This is similar to the effects of exercise. Summary: https://www.sciencedaily.com/releases/2026/10/261027231021.htm Original paper: https://www.tandfonline.com/doi/full/10.1080/23328940.2026.2645467#ack #Science #Health #Sauna #ImmuneSystem #WhiteBloodCells #Exercise