Sauna and Blood Pressure in Australia: What the Research Shows

Does sauna help blood pressure? The research on sauna and blood pressure is promising but needs careful reading. A single session temporarily lowers blood pressure, and in a Finnish cohort of 2,315 middle-aged men followed for about 20 years, those who used a sauna 4–7 times per week had about a 50% lower risk of fatal cardiovascular disease than once-a-week users (Laukkanen et al., JAMA Internal Medicine, 2015). That is an association in men and does not prove the sauna caused the difference. The long-term data come from traditional Finnish saunas, not infrared cabins or steam rooms.

With about one in four Australian adults recording high blood pressure, the detail matters. This guide covers the proposed mechanisms, what the research does and does not show, a sensible session routine, and what a traditional sauna needs to deliver real Finnish-style heat.

About One in Four Australian Adults Has High Blood Pressure

In 2022, 23.3% of Australian adults had high measured blood pressure and 11.6% reported having hypertension (ABS, 2022). Most people manage it with medication, dietary change and exercise, all of which are evidence-backed. Traditional Finnish sauna is a lifestyle habit with a growing body of observational and short-term research behind it, and it is worth understanding what that research actually says.

The problem is not access to the research. The problem is that “sauna” in Australia has been conflated with whatever infrared cabinet you can buy flat-packed from a big-box retailer, assembled in forty minutes, and operated at 50°C. That is not sauna. That is a warm box. And the science was never conducted on a warm box.

If you are managing cardiovascular risk and someone told you sauna might help, the version studied in Finland is a traditional sauna with real convective heat and a stone heater that supports a löyly pour. This article focuses on blood pressure and cardiovascular evidence.

Does Sauna Lower Blood Pressure? What the Finnish Research Actually Shows

Research suggests traditional Finnish sauna has short-term effects on blood pressure and is associated with lower long-term cardiovascular risk. The long-term evidence is observational: it comes from prospective cohort studies in Finland, which show associations rather than cause and effect.

The landmark study is Laukkanen et al., JAMA Internal Medicine, 2015: a cohort of 2,315 Finnish men aged 42–60, followed for a median of about 20 years. Compared with once-weekly use, sauna 4–7 times per week was associated with about a 50% lower risk of fatal cardiovascular disease, and 2–3 times per week with about a 27% lower risk. The results were adjusted for major cardiovascular risk factors, but as an observational study it cannot prove cause.

For blood pressure specifically, a 2018 study gave 102 adults with at least one cardiovascular risk factor a single 30-minute sauna at 73°C. Immediately afterwards, average systolic pressure fell from 137 to 130 mmHg and diastolic from 82 to 75 mmHg, and arterial stiffness (pulse wave velocity) also fell. Systolic pressure was still lower than baseline after 30 minutes of recovery (Lee et al., Journal of Human Hypertension, 2018). Separately, Finnish men who used a sauna 4–7 times a week were less likely to develop high blood pressure over follow-up than once-weekly users (Zaccardi et al., American Journal of Hypertension, 2017).

A separate Finnish cohort of 1,628 men and women aged 53–74 found that sauna bathing 4–7 times per week was associated with a 61% lower risk of stroke compared with once-weekly use over about 15 years (Kunutsor et al., Neurology, 2018). The association was similar in men and women. Proposed explanations include effects on blood pressure and the blood vessel lining, but these remain hypotheses.

A 2018 review by the same Finnish research group in Mayo Clinic Proceedings lists the mechanisms researchers have proposed, including improved endothelial function, reduced arterial stiffness, changes in autonomic (nervous system) function and lower blood pressure. It describes these benefits as possible links that need further study rather than proven effects.

For a deeper look at the cardiovascular research, see our detailed guide on sauna cardiovascular health in Australia.

The Physiological Mechanism: How Heat Changes Your Vascular System

Researchers have proposed three main pathways by which sauna heat may affect the blood vessels. Understanding them explains why regular use is the pattern the research points to.

Vasodilation and Cardiac Output

As your body heats up, blood vessels in the skin widen (vasodilation) and heart rate rises, a response similar to light-to-moderate exercise. In one laboratory study, heart rate rose by about 60–90% during 80–100°C sauna sessions (Kukkonen-Harjula et al., European Journal of Applied Physiology, 1989). Blood is redirected towards the skin to release heat.

Straight after a session, blood pressure tends to sit a little lower than before, as the Lee et al. study above showed. Whether repeated sessions lower resting blood pressure over the long term has not been tested in large trials, although the Finnish cohort data on new hypertension point in that direction.

Reduced Arterial Stiffness

Arterial stiffness is an established predictor of cardiovascular events. In the Lee et al. study, a single sauna session reduced pulse wave velocity, a standard measure of arterial stiffness, immediately afterwards.

Longer-term heat studies are encouraging but different from sauna. In one small trial, young sedentary adults who used hot-water immersion 4–5 times a week for 8 weeks had improved endothelial function, lower arterial stiffness and lower mean blood pressure (Brunt et al., Journal of Physiology, 2016). That was hot-tub immersion rather than sauna, in a small group.

Heat-Shock Proteins and Systemic Inflammation

Raised body temperature triggers the production of heat-shock proteins (HSPs), molecules that help protect cells from stress and repair damaged proteins. Researchers have suggested HSPs could play a part in sauna’s associations with heart health, but this has not been confirmed in people.

Chronic low-grade inflammation is linked with cardiovascular disease, and some researchers think regular heat exposure may influence it. The evidence for this in sauna users is still limited. For more on how these ideas connect to healthy ageing, read our guide on sauna and longevity in Australia.

Traditional Sauna vs Infrared for Blood Pressure

This is where many Australian buyers get confused. The long-term cardiovascular data come from traditional Finnish saunas, typically around 70–100°C, and the acute blood pressure study above used 73°C. There is no equivalent long-term data for infrared saunas.

Infrared saunas typically operate at about 45–60°C and heat the body mainly by radiant panels. You will sweat and feel warm, but the heat load is different, and infrared has not been studied in the same long-term way. That does not mean infrared does nothing; it means the evidence base is different.

If you want the type of sauna the research is based on, that means traditional Finnish heat. Our detailed breakdown of traditional sauna vs infrared covers the full comparison across temperature, humidity and documented health outcomes.

Sauna and Contrast Therapy: Does Adding Cold Plunge Amplify the Blood Pressure Benefit?

Contrast therapy means alternating sauna heat with cold water immersion. Heat widens blood vessels and cold narrows them, and many people enjoy the routine. However, there is no good evidence that adding cold water amplifies sauna’s effect on blood pressure, and sudden cold immersion briefly raises blood pressure and heart rate (the cold shock response). If you have high blood pressure or a heart condition, speak to your doctor before adding cold plunges.

Some of the most-cited vascular heat research does not involve cold at all. Brunt et al. (2016) used hot-water immersion 4–5 times a week for 8 weeks and found improvements in endothelial function, arterial stiffness and mean blood pressure in young sedentary adults. Claims that contrast routines improve vagal tone, resting heart rate or heart rate variability for blood pressure have not been established in controlled trials.

For people who already use contrast therapy and have medical clearance, a common routine is 10–20 minutes in the sauna followed by a short, controlled cold immersion, repeated for 2–3 rounds. This is general guidance rather than a research-tested blood pressure protocol. Our complete guide to contrast therapy in Australia details the evidence and session structure.

What Does a Blood-Pressure Sauna Protocol Actually Look Like?

The frequency figures come from the Finnish cohort: compared with once-weekly users, men who used a sauna 2–3 times per week had about a 27% lower risk of fatal cardiovascular disease, and those using it 4–7 times had about a 50% lower risk. These are associations, not a prescribed dose. The study did not test specific temperatures; in the published data, average sessions were about 14 minutes at around 79°C. The routine below is general guidance for healthy adults.

In the Finnish data, the clearest pattern was frequency: regular sessions through the week, rather than occasional long ones. There is no evidence that marathon sessions add benefit, and they add risk. For a full breakdown, see our guide on how often you should sauna.

Is Sauna Safe for People with High Blood Pressure?

For most healthy adults, and many people with well-managed blood pressure, traditional sauna is generally well tolerated. Blood pressure usually dips a little after a session, and the long-term Finnish data show lower cardiovascular risk among frequent users rather than higher risk. Even so, check with your doctor first if you have high blood pressure or take blood pressure medication, as the combination of heat and medication can make dizziness or fainting more likely.

Some conditions call for medical clearance before any sauna use, including uncontrolled or very high blood pressure, a recent heart attack or other cardiac event, unstable angina and severe aortic stenosis. Avoid alcohol before or during a session.

If you are new to sauna and managing cardiovascular risk factors, start conservatively: short sessions of 5–10 minutes at a moderate temperature, leave if you feel dizzy or uncomfortable, and build up gradually over several weeks. The Finnish data come from long-term habitual users, so any benefit would build over months and years, not single sessions. Our complete guide to sauna health risks and safety in Australia covers the full list of precautions.

What to Look for in a Home Sauna

If you are thinking about a home sauna, it pays to know what separates a traditional Finnish sauna from a warm box: real heat, enough stone mass for löyly, clean materials and good ventilation.

Some budget saunas use glued panels, MDF or particle board. Many adhesives and engineered boards can release volatile organic compounds such as formaldehyde, which IARC (the WHO’s cancer agency) classifies as a Group 1 carcinogen, and heat generally increases emissions. The Genesis uses clear-grade Japanese cedar with no glue, no MDF and no wood filler, with 38mm walls and a choice of Natural (untreated) or Charcoal (non-VOC black paint) finish.

The heater matters just as much. The Genesis uses a 9kW heater: the HUUM DROP holds about 60kg of stones and the Harvia Vega about 20kg. Stone mass helps the sauna hold its heat when you pour löyly, so the steam rises without the room temperature collapsing. A small heater with few stones tends to lose heat quickly after a pour.

Psycle Clean Air active ventilation (88 or 120 m³/h, dual speed) plus a passive hatch keeps fresh air moving through a multi-round session. Amber and red blue-light-free lighting keeps evening sessions relaxing. For outdoor installs, the optional Colorbond roof kit is required for the structural warranty, and both saunas carry a 5-year structural cabin warranty.

Genesis vs Genesis Mini: Which Is Right for Your Home?

Both carry identical zero-toxin specifications. The decision comes down to space and how many people will use it regularly.

If you have the space, the Genesis is the choice: its 3–5 person capacity suits households who want to sauna together. The Genesis Mini suits smaller courtyards or one to three regular users, with the same materials in a smaller footprint.

Both need a dedicated electrical circuit installed by a licensed electrician and a hard, level base. Assembly is designed for two people, guided by a video installation guide. Saunas are built in production batches, with in-stock units when available. Our guide to home sauna costs in Australia covers the full price breakdown and running costs.

Frequently asked questions

Does sauna lower blood pressure?

In the short term, yes. In one study, a single 30-minute sauna at 73°C lowered average systolic blood pressure from 137 to 130 mmHg immediately afterwards in adults with cardiovascular risk factors. Over the long term, Finnish men who used a sauna 4–7 times a week were less likely to develop high blood pressure than once-weekly users, but that is an association. Sauna is not a treatment for hypertension.

Is sauna safe if you have high blood pressure?

Many people with well-managed blood pressure use a sauna without problems, but speak to your doctor first, especially if you take blood pressure medication. People with uncontrolled hypertension, a recent cardiac event, unstable angina or severe aortic stenosis should not use a sauna without medical clearance. Start with short, moderate sessions.

How often do you need to sauna to lower blood pressure?

There is no proven dose. In the Finnish cohort, the lowest risk of fatal cardiovascular disease was seen in men who used a sauna 4–7 times per week, with smaller differences at 2–3 times per week. Regular sessions through the week, rather than occasional long ones, is the pattern the research points to.

Does infrared sauna lower blood pressure the same way?

It has not been studied in the same way. The long-term cardiovascular data come from traditional Finnish saunas, and there is no equivalent long-term data for infrared. Some small studies of far-infrared therapy exist, but they cannot be compared directly with the Finnish cohort results.

Can sauna replace blood pressure medication?

No. Sauna is a lifestyle habit with promising, mostly observational evidence, not a substitute for medication. If you take antihypertensive medication, continue your prescribed treatment and discuss sauna use with your GP or cardiologist.