Saunas are often mentioned as a way to support heart health and lower blood pressure. There is real research behind that idea, but most of it comes from traditional saunas. Infrared saunas have a smaller body of evidence, so it helps to know what is known and what is still uncertain.

What Happens to Blood Pressure in the Heat

When your body heats up, blood vessels near the skin widen to release heat. Wider vessels can lower blood pressure for a while during and after a session. Your heart rate also rises, similar to light exercise. This short-term effect is why some people feel light-headed when they stand up quickly after a sauna.

What the Research Shows

  • Traditional saunas: large long-term studies from Finland found that frequent sauna bathing was linked with lower rates of high blood pressure and heart problems. These studies show a link, not proof of cause.
  • Short-term studies: blood pressure often drops after a single session and returns toward normal over the following hours.
  • Infrared saunas: smaller studies suggest possible benefits for blood vessel function and blood pressure, but there are fewer of them and many are short.

Infrared vs Traditional for Heart Health

Factor Traditional Sauna Infrared Sauna
Long-term research More, mostly from Finland Limited and smaller
Air temperature Higher Lower
Heart rate rise Often higher Often milder
Comfort for beginners Harder for some Often easier

Our guide to infrared vs traditional saunas covers the other differences.

A Sauna Is Not a Treatment

Sauna use should never replace blood pressure medication or a plan from your doctor. If you have high blood pressure, think of a sauna as a possible add-on to proven habits like regular exercise, less salt, a healthy weight, limited alcohol and good sleep.

Who Should Talk to a Doctor First

  • People with uncontrolled high blood pressure or very low blood pressure
  • Anyone with heart disease, a recent heart attack or chest pain
  • People taking medications that affect blood pressure or sweating
  • Pregnant women

Using a Sauna Safely for Heart Health

  • Start with short sessions at lower temperatures.
  • Drink water before and after, and skip alcohol.
  • Stand up slowly and sit for a minute if you feel dizzy.
  • Leave right away if you feel chest pain, confusion or nausea.

Our sauna session calculator suggests a starting session length.

Final Thoughts

Regular sauna use is linked to healthier blood pressure, mostly in studies of traditional saunas. Infrared saunas may offer similar effects, but the research is thinner. Enjoy it as part of a healthy routine, keep sessions moderate and work with your doctor if you have any heart or blood pressure concerns.

FAQs

Does sauna lower blood pressure right away?

Often yes, for a short time. Blood vessels widen in the heat, and pressure usually returns toward normal within hours.

Is an infrared sauna safe with high blood pressure?

It may be for some people, but ask your doctor first. Safety depends on how well your blood pressure is controlled and your other health conditions.

How often do people use saunas in heart health studies?

Many studies looked at people using saunas several times per week. Benefits were linked with regular, long-term use.