Scientists Say 4-6 Days of Sauna Heat Training May Aid Heatwave Adaptation
Updated
Updated · The Guardian · Jul 29
Scientists Say 4-6 Days of Sauna Heat Training May Aid Heatwave Adaptation
3 articles · Updated · The Guardian · Jul 29
Summary
Repeated heat exposure from saunas or hot-water immersion may help people adapt to heatwaves, scientists say, but as a preparation strategy rather than something to use during extreme heat itself.
40-60 minutes of daily heat exposure for at least four to six days can trigger adaptations such as earlier sweating, better skin blood flow, expanded plasma volume and lower cardiovascular strain; benefits last about a week.
Researchers said heat acclimation can also change behavior, with heat-acclimated people pacing themselves better, hydrating more consistently and spotting warning signs earlier.
Experts warned the approach is not suitable for everyone—especially people with fever, unstable angina, a recent heart attack or uncontrolled low blood pressure—and unsupervised use during a heatwave can raise fainting and heat-illness risks.
The advice comes as the UK faces its fourth heatwave of the year and heat alerts across much of England, with scientists stressing that hydration, avoiding peak heat and protecting vulnerable people remain the priority.
Why are Brits flocking to extreme saunas during a historic heatwave, and could this counterintuitive trend actually train bodies for climate change?
What hidden cardiovascular dangers await wellness enthusiasts who mistakenly use intense sauna sessions as a quick fix for surviving deadly summer heatwaves?