Hot Baths Trigger Exercise-Like Effects

A 45-minute hot bath raises your core body temperature by 1.1 degrees C (2 degrees F) and boosts cardiac output as much as a moderate-intensity cardio workout Hot water immersion increases immune activity, helps control inflammation, and supports immune surveillance Compared to traditional and infrared saunas, hot baths triggered the strongest cardiovascular and immune responses due to water's more efficient heat transfer Very hot water dries out your skin, alters its pH, and disrupts your skin microbiome, especially if you have eczema, rosacea, or sensitive skin You can reduce risks by keeping bath sessions under 30 minutes, moisturizing with coconut oil immediately afterward, and rotating with sauna usage if hot baths irritate your skin