Sauna Bathing and Heart Health: What the Research Says

Introduction

This review looks at whether sauna bathing can help people with ischemic heart disease, a condition where the heart doesn't get enough blood flow. Sauna use may offer heart benefits similar to moderate exercise.

What the study did

Researchers reviewed studies from 2015 to 2025 on sauna bathing and heart disease. They looked at both Finnish and far-infrared saunas. The studies included people with ischemic heart disease, but the exact number of participants and study durations were not reported.

What it found

• Sauna use may improve blood vessel function and lower blood pressure.
• It may help the heart pump blood more efficiently.
• It may reduce inflammation and improve the balance of the nervous system.
• Observational studies consistently show heart benefits, but results from randomized controlled trials are mixed.

How much to trust it

This review earns a Moderate trust tier because it is a review of existing studies, not a new experiment. The biggest limitation is that the results from stronger studies (randomized trials) are mixed, so the evidence is not conclusive.

Your action plan

• If you are generally healthy, occasional sauna use (e.g., once or twice a week) may be safe and relaxing.
• If you have heart disease or other health conditions, talk to your doctor before starting sauna bathing.
• Stay hydrated before and after sauna use, and limit sessions to 15-20 minutes at a comfortable temperature.

This summary is for general information only and is not medical advice. Talk to a qualified professional before changing anything about your health.