How Sauna Use Could Help You Live Longer

Everyone wants to know the secret to a longer, healthier life. While there isn't a single habit that guarantees longevity, few wellness practices have produced evidence as compelling as regular sauna bathing.

For centuries, Finnish culture has treated the sauna as a normal part of everyday life rather than an occasional luxury. Today, modern research is beginning to explain why. Large, long-term studies suggest that people who use saunas regularly are less likely to develop many of the diseases that commonly shorten life—including cardiovascular disease, stroke and dementia.

The most influential evidence comes from the University of Eastern Finland, where researchers followed 2,315 middle-aged men for a median of 20.7 years. Published in JAMA Internal Medicine, the study found a clear dose-response relationship between sauna frequency and longevity. Men using a sauna two to three times per week had a 24% lower risk of all-cause mortality than those using it just once weekly. Those enjoying four to seven sessions per week experienced a 40% lower risk of dying from any cause, while their risk of fatal cardiovascular disease was reduced by up to 63%.

The researchers were careful not to claim that sauna use directly extends lifespan by a specific number of years. Instead, the evidence suggests that regular sauna bathing substantially lowers the risk of many conditions that contribute to premature death.

Why Does Sauna Use Support Healthy Ageing?

The answer lies in how the body responds to heat.

Within minutes of entering a traditional sauna, your cardiovascular system begins behaving much like it does during moderate-intensity exercise. Heart rate rises, blood vessels dilate, circulation improves, and cardiac output can increase significantly. As your body cools afterwards, blood pressure often falls below its starting level.

According to a 2024 review published in Mayo Clinic Proceedings, repeated passive heat exposure improves vascular function, supports healthy blood pressure, reduces arterial stiffness and may improve overall cardiovascular fitness. These adaptations help explain why regular sauna users consistently demonstrate lower rates of cardiovascular disease across multiple studies.

Heat Makes Your Cells More Resilient

The benefits extend well beyond your heart.

Heat exposure stimulates the production of heat shock proteins—specialised proteins that repair damaged cells, stabilise newly formed proteins and protect tissues against oxidative stress. Scientists describe this process as hormesis, where exposing the body to manageable levels of stress encourages it to become stronger and more resilient over time.

Exercise works through many of the same biological pathways, which is why many researchers now view sauna bathing as an excellent complement to regular physical activity rather than simply a way to relax.

Repeated sauna use has also been associated with lower levels of chronic inflammation, improved endothelial function and healthier metabolic markers, all of which are recognised contributors to healthy ageing.

Your Brain May Benefit Too

Perhaps the most fascinating research concerns cognitive health.

A second study from the same Finnish cohort, published in Age and Ageing, examined dementia outcomes over two decades. Participants using a sauna four to seven times per week had a 66% lower risk of developing dementia and a 65% lower risk of Alzheimer's disease compared with those using a sauna only once each week.

As with all observational research, this does not prove that sauna use directly prevents dementia. However, researchers believe improved cardiovascular health, reduced inflammation and better cerebral blood flow may all contribute to the association.

Given that dementia remains one of the UK's biggest health challenges—and that NHS England spends more than £11 billion each year on dementia care—these findings have attracted considerable scientific attention.

Why This Matters in the UK

Cardiovascular disease remains one of Britain's leading causes of premature death.

According to the British Heart Foundation, around 160,000 people die from cardiovascular disease every year in the UK, accounting for roughly one in four deaths. While medication and medical treatment remain essential, preventive lifestyle habits are increasingly recognised as one of the most effective ways to reduce future disease burden.

Regular sauna bathing isn't a replacement for exercise, healthy eating or good sleep—but growing evidence suggests it deserves a place alongside them.

Can a Sauna Actually Help You Live Longer?

It's the obvious question.

The honest answer is that no scientist can currently say exactly how many extra years sauna use might add to your life. No published study has demonstrated that sauna bathing extends lifespan by a specific amount.

What the evidence does show, however, is remarkably consistent.

Across large population studies and systematic reviews, people who use saunas regularly are significantly less likely to die prematurely from cardiovascular disease and other major causes of death. When a lifestyle habit repeatedly reduces mortality risk by 20–40% across decades of follow-up, researchers take notice.

Like exercise, the benefits appear to come from consistency rather than intensity. You don't need marathon sauna sessions or extreme temperatures. Building two to four sessions into your weekly routine may be enough to support meaningful improvements in long-term health, with the greatest benefits observed among those making sauna bathing a lifelong habit.

In other words, while no one can promise you'll live to 100, the evidence suggests that regular sauna use may help you give yourself the best possible chance of living a longer, healthier life.

Frequently Asked Questions

Does using a sauna make you live longer?

No study has proven that saunas directly extend lifespan by a specific number of years. However, long-term research has consistently found that people who use saunas several times a week have significantly lower rates of cardiovascular disease and all-cause mortality than infrequent users.

How often should you use a sauna for longevity benefits?

The strongest evidence comes from people using a sauna two to seven times per week. The greatest reductions in mortality risk were observed among participants using a sauna four to seven times weekly, although meaningful benefits were also seen with two to three sessions.

Is a sauna as good as exercise?

No. Sauna bathing produces some cardiovascular responses that resemble moderate exercise, including increased heart rate and improved circulation, but it does not build muscle, improve aerobic fitness or replace physical activity. Most researchers consider it a complement to exercise rather than an alternative.

How long should a sauna session last?

For most healthy adults, 15 to 20 minutes at 70–100°C is sufficient. Beginners should start with shorter sessions, stay well hydrated and leave immediately if they feel dizzy or unwell.

Are infrared saunas included in these studies?

Most of the landmark longevity research was conducted using traditional Finnish saunas, not infrared saunas. While early research into infrared therapy is promising, the strongest evidence currently supports traditional sauna bathing.

References

• Laukkanen T, et al. Association Between Sauna Bathing and Fatal Cardiovascular and All-Cause Mortality Events. JAMA Internal Medicine. 2015.
• Laukkanen T, et al. Sauna Bathing and Risk of Dementia and Alzheimer's Disease. Age and Ageing. 2017.
• Mayo Clinic Proceedings. Passive Heat Therapy Review. 2024.
• British Heart Foundation. UK Cardiovascular Disease Statistics.
• NHS England. Dementia Care Statistics.

Ready to make sauna bathing part of your wellness routine? Browse our collection of premium indoor and outdoor saunas and discover how regular heat therapy can become one of the simplest investments you make in your long-term health.