New research shows hot tubs trigger surprising health benefits saunas don’t

Researchers found that hot tubs raise core body temperature more effectively than traditional or infrared saunas, leading to stronger boosts in blood flow and immune activity. Only hot-water immersion produced measurable changes in inflammatory markers. These effects can persist beyond the session, suggesting a sustained health benefit. For anyone unable or unwilling to exercise, heat therapy may offer a surprisingly effective option.

source https://www.sciencedaily.com/releases/2025/11/251120002611.htm