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Dry saunas for runners: how useful are they?

For endurance athletes, it’s all about finding that extra edge—whether it’s a faster recovery, a boost in endurance or a way to handle extreme conditions better. Recently, the dry sauna has entered the spotlight as a potential training tool, touted for their health benefits, and their potential ability to speed up recovery while being a useful tool for heat acclimation. But can a dry sauna actually enhance endurance performance? Here’s what the science says.

How the dry sauna affects your cardiovascular system

When you step into a dry sauna, your heart rate will rise similarly to what you’d experience during an easy run. This increase in heart rate happens because your body is working to stay cool in the heat, which can lead to cardiovascular benefits. Some studies have shown that even a single session in a sauna has a positive effect on heart rate variability (HRV), a key indicator of cardiovascular health that’s often used by athletes. For endurance athletes, this could mean a more efficient heart, which may help when it’s time to hit the trails or track.

Heat acclimation and improved performance

Spending time in a sauna may also help you acclimate to higher temperatures, which can be the difference between finishing a race and taking a DNF when running in warm conditions. Research indicates that heat acclimation from regular sauna sessions can improve blood plasma volume, helping with thermoregulation and endurance. Your body becomes more efficient at cooling itself, meaning you might handle a hot race day a little better. Just 15 to 20 minutes a few times a week could potentially make a difference.

The muscle-recovery angle

Endurance athletes know that recovery is as important as the workout itself. Sauna use has been shown to reduce muscle soreness by boosting circulation, which helps deliver nutrients to muscle tissues and remove metabolic waste. A post-run sauna session could potentially speed up recovery, allowing you to bounce back faster for your next workout. Studies suggest that heat exposure increases the release of human growth hormone, which aids in muscle repair.

Pay attention to how you feel

While sauna sessions offer intriguing benefits, they’re not a substitute for actual training. Saunas are also dehydrating, so it’s essential to rehydrate thoroughly afterward. If you have any cardiovascular concerns or other medical conditions, consult a professional before diving in. It’s all about balance—sauna use can be a valuable supplement to an existing training routine, but is not a replacement for it.