Scientists at the British University of Portsmouth are researching whether frequent hot tub use can improve health in older adults. The new study aims to explore if hot water immersion can replace traditional exercise in terms of health benefits.

Researchers will investigate if hot tub use can improve cardiovascular and cognitive health, as well as muscle function, similar to the benefits achieved by exercise.

According to Daniel Piccolo, a researcher from the University’s School of Psychology, Sport and Health Sciences, frequent exercise is known to significantly improve health, but many people find it difficult to follow exercise routines.

“Growing evidence suggests that passive heating, such as hot water immersion or saunas, can offer similar benefits, thanks to a rapid rise in body temperature,” Piccolo said. “However, most research to date has focused on younger people, leaving questions about its impact on older adults. This study aims to determine if similar health benefits can be achieved in individuals aged 55 and older.”

Participants will sit in a 104°F hot tub for 60 minutes, approximately three times per week, for a six-week period. Researchers will assess the effects of the passive bathing, including cardiovascular function, cognitive abilities, muscle strength, balance, and walking capability.

Non-invasive tests and blood samples will also be taken to measure different biochemical markers related to health.

Piccolo said that the participants must be generally healthy, without major cardiovascular or metabolic conditions such as Type 2 diabetes.

“By expanding our understanding of passive heating, this study could offer a feasible and enjoyable alternative to exercise for older adults,” Piccolo said.