It’s called immersion diuresis – a normal physiological response by the body to being immersed in waterI’m midway into my hour-long swim when it hits: I really have to pee. This always happens. It doesn’t help to curb my morning coffee or use the restroom beforehand. My bladder doesn’t care.Why does this happen? “It’s a normal physiological response by the body to being immersed in water,” says Dr Stavros Kavouras, assistant dean, professor of nutrition and director of the Hydration Science Lab at Arizona State University. And it’s not just me: “It’s something that happens to all swimmers.” Continue reading...
Source: https://www.theguardian.com/global/2026/jun/16/why-swimming-makes-you-feel-like-peeing