Sauna Use and Cardiovascular Health: What the Science Says

When we sit in a sauna, the first thing we feel is the heat. Then comes relaxation — that physical sense of release that settles in slowly. But what we don't feel right away, and what may matter even more, are the changes happening inside our cardiovascular system.

Over recent years, researchers around the world have studied the effects of sauna on heart health. The findings are consistent: regular sauna use can have real, measurable effects on circulation, blood pressure and even the risk of heart disease.

In this article we'll look at what the studies say, how it all works, and what it means for anyone bringing sauna into a wellbeing routine.

What's at stake: why cardiovascular health matters so much

Cardiovascular disease is still one of the leading causes of death worldwide. The good news? Many of the risk factors — high blood pressure, poor circulation, chronic stress — can be managed through consistent lifestyle changes.

And this is where the sauna starts to stand out — not just as a relaxing habit, but as a practice that can genuinely support heart health.

More efficient blood circulation

The heat of a sauna causes blood vessels to dilate — a process known as vasodilation. With vessels more open, blood flows more easily, reducing the resistance the heart faces when pumping.

A study published in JAMA Internal Medicine (2015) showed that sauna use produces increases in heart rate and blood flow comparable to moderate physical exercise. In other words, the body is at work — while at rest.

This boost in circulation helps:

• Deliver oxygen and nutrients more effectively

• Ease muscles and joints

• Keep blood vessels more flexible over time

Sustained reductions in blood pressure

High blood pressure is silent but dangerous. Sauna use can help manage it.

According to a study by the University of Eastern Finland, which followed more than 1,600 men over 20 years, those who used a sauna 4–7 times a week were 47 % less likely to develop hypertension, compared with those who used one only once a week.

Two factors appear to drive this:

1. Greater elasticity in the arteries, thanks to heat and vasodilation

2. Reduced sympathetic nervous-system activity, which supports relaxation and recovery

Lower risk of serious heart conditions

In an even broader study — also from Finland, also published in JAMA Internal Medicine (2015) — researchers followed over 2,300 men for two decades.

The findings were clear:

• People who used a sauna 2–3 times a week had 23 % lower risk of death from heart-related causes

• Those using it 4–7 times a week saw 50 % lower risk

It's worth noting that these results held up even after adjusting for factors such as smoking, physical activity, BMI and alcohol intake. Used regularly, sauna seems to be part of a protective lifestyle.

A gentle workout for the heart

During a sauna session, the heart beats faster — but in a controlled way. This kind of mini-workout strengthens the heart muscle without the physical exertion of exercise.

This cardiovascular response can be especially useful for:

• People with reduced mobility

• Older adults looking after their heart health

• Athletes during post-training recovery

Beyond that, studies on heart-rate variability (HRV) — a marker of cardiovascular resilience — show that sauna use improves HRV, especially when combined with a cool-down phase after the heat.

Stress, sleep and the heart

Chronic stress, mental fatigue and poor sleep affect the heart as much as physical factors. By stimulating the parasympathetic nervous system, the sauna helps the body switch out of alert mode and into recovery.

A study published in the Journal of Human Hypertension showed that participants had lower cortisol levels after sauna sessions. Many also reported improvements in sleep and mood.

Better rest and lower stress mean less pressure on the cardiovascular system.

Traditional sauna, infrared sauna or Turkish bath: which is best for cardiovascular health?

When it comes to choosing a sauna to support heart health, there's no single answer. Infrared saunas, traditional Finnish saunas and even Turkish baths (hammam) all offer real benefits for circulation, blood pressure and relaxation. But each works on the body differently — and that difference can shape which suits your lifestyle and goals best.

Traditional Finnish sauna

• The traditional sauna is known for its versatility. It can deliver gentle sessions or intense ones, with temperatures typically between 70 °C and 100 °C.

• The environment can be dry or humid, depending on whether water is poured over the hot stones (löyly).

• Heating can come from a wood-burning or electric heater, giving you wide freedom to shape the session — from gradual warmth to direct, intense heat.

• This flexibility makes it ideal for both experienced users and beginners.

• It stimulates blood circulation, drives intense sweating in a short time, and supports toxin release through the skin.

Infrared sauna

• Uses infrared panels to heat the body directly, without raising the air temperature as much.

• Runs at lower temperatures (typically 40–60 °C) and allows longer sessions of 20 to 45 minutes.

• An excellent choice for people who are heat-sensitive or for those with mild cardiovascular conditions, who benefit from a gentler approach.

• The heat penetrates deeper into the tissue, which also helps with muscle recovery and joint pain relief.

Turkish bath (hammam)

• Based on hot, humid steam, with more moderate temperatures (40–50 °C) and near-total humidity.

• It doesn't raise heart rate as much as a dry sauna, but it promotes deep relaxation and is particularly good for the respiratory system.

• A good alternative for those wanting enveloping, less intense heat.

How to bring sauna into your routine

Sauna doesn't replace good food, exercise or proper rest. But it can complement all of them effectively.

If you're thinking about installing a sauna at home, look beyond the immediate comfort. You're investing in a space to support cardiovascular health naturally, consistently, and — above all — sustainably.

Conclusion

The science is clear: regular sauna use is linked to real improvements in heart health. Lower blood pressure, better circulation, lower risk of heart disease. And those effects show up not through intense sessions, but through regular habits.

In our store, we help people every day choose the right model for their goals — whether a traditional sauna, a compact infrared system, or something in between. If you'd like guidance, we're here to help.

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