Getting Hot on Purpose Has Health Benefits

The wellness world is always chasing the next breakthrough. A newer device, a more complicated protocol, another habit positioned as the missing piece of the longevity puzzle. And yet, researchers and physicians keep returning to one of the oldest wellness practices around: sitting in a very hot room. Sauna has become a recurring subject for experts including Dr. Rhonda Patrick, Dr. Andrew Huberman, Dr. Susanna Søberg, and Dr. Stacy Sims. Their areas of expertise differ, but the reasons for their interest tend to overlap. Regular heat exposure may support cardiovascular health, recovery, stress resilience, and several of the systems involved in healthy aging. What makes sauna particularly compelling is that a growing body of research is beginning to explain why humans may have continued seeking out intentional heat for so long.

Your Heart Is Working, Even While You Sit

Sauna gives the body a manageable amount of stress. This is often called hormesis, which is the idea that a small challenge can help the body adapt and become more resilient. Exercise works in a similar way. You stress the body, recover, and gradually become better equipped to handle that stress again. Dr. Andrew Huberman and Dr. Susanna Søberg have both spoken about deliberate heat exposure through this lens. Researchers are especially interested in heat shock proteins, which help cells respond to stress and maintain normal cellular function. One study found that sauna exposure affected genes involved in the heat shock response, though scientists are still learning what that may mean for long term health.

The practical takeaway is that hotter is not always better. A sauna should feel challenging, but it should not leave you dizzy, nauseated, or completely drained. You are not getting extra benefits for staying in longer than your body wants you to. Dr. Rhonda Patrick often points to Finnish research linking frequent sauna bathing with lower rates of cardiovascular and all cause mortality. In one of the best known studies, men who used a sauna four to seven times a week had a lower risk of fatal cardiovascular events than those who used one once weekly. Other research involving both men and women found that more frequent sauna use was associated with a lower risk of cardiovascular mortality. Regular sauna bathing has also been linked with a lower risk of developing high blood pressure.

Sitting in a dry, overheated space forces the cardiovascular system to work harder than it does during most sedentary hours. The body widens blood vessels, increases circulation, and raises heart rate to regulate temperature. This sustained demand may train the heart and blood vessels in ways that mimic the benefits of aerobic exercise, even without the physical exertion of moving your body. For many people, especially those with limited mobility or those whose joints cannot handle high impact activity, this passive stress could offer a unique way to maintain circulatory health and metabolic function. The data comes from observational studies, so it cannot prove that sauna use causes better heart health, but the consistency of the findings across different populations is notable.

Sauna May Matter for Brain Health Too

Some of the most interesting sauna research involves the brain. A long term Finnish study found that men who used a sauna frequently had a lower observed risk of dementia and Alzheimer’s disease. Another study involving nearly 14,000 people also found an association between regular sauna use and a lower risk of dementia. This does not mean sauna prevents dementia. Researchers are still trying to understand why the relationship exists.

One possible explanation is the connection between heart health and brain health. The brain depends on healthy blood vessels and steady blood flow, so habits that support the cardiovascular system may also matter for cognitive health over time. The science is still developing, but it suggests sauna may offer more than a temporary sense of relaxation after a workout.

Traditional Sauna or Infrared Sauna?

Most of the longevity research comes from traditional Finnish sauna, which heats the air around you and usually operates at a higher temperature. Infrared sauna works differently by using infrared energy to warm the body while the surrounding air stays cooler. Many people find it easier to tolerate, especially if traditional sauna feels overwhelming. Both can raise body temperature and heart rate, but they have not been studied equally. A small study found that infrared sauna created measurable cardiovascular and thermal responses in healthy women. Early research has also looked at infrared sauna for muscle soreness and exercise recovery. Traditional sauna still has the strongest longevity data behind it. Infrared may still be a good option for relaxation, recovery, and regular heat exposure, particularly if the lower temperature means you will actually use it.

Recovery May Be the Benefit You Notice First

Sauna can feel especially good after a hard workout or a long, stressful day. Dr. Stacy Sims often talks about how important recovery becomes for maintaining strength, performance, and consistency as we age. Research in this area is still limited, but studies have explored infrared sauna for muscle soreness and neuromuscular recovery. Traditional sauna research has also found changes in heart rate variability that may reflect greater parasympathetic activity during recovery. In everyday terms, sauna may help the body shift into a calmer state. There is also something to be said for spending fifteen or twenty minutes without messages, notifications, or another screen demanding your attention.