Traditional saunas have stronger long-term evidence for heart health and longevity, while infrared saunas offer a gentler, lower-temperature experience that may be better for heat-sensitive users.
Picking between an infrared and a traditional sauna means choosing between two kinds of heat—and two bodies of evidence. Traditional Finnish saunas have decades of large-scale research tying regular use to lower risks of heart disease, stroke, and dementia. Infrared saunas run at lower temperatures, heat your body directly instead of the air, and have a smaller evidence base focused on pain, recovery, and specific conditions. The right choice depends on your goals and heat tolerance.
How Infrared and Traditional Saunas Work
The fundamental difference is what gets heated. Traditional saunas use a stove with heated rocks to warm the air to 150–194°F, heating your body from the outside in. Infrared saunas use infrared light panels that penetrate the skin, warming your body while the air stays cooler—typically 100–165°F. The lower ambient temperature of infrared makes it realistic for people who find traditional saunas oppressive or hard to tolerate. Traditional saunas deliver intense heat stress in a shorter session, which is linked to most cardiovascular evidence.
A 2024 study directly comparing the two in young healthy adults found traditional sauna exposure produced greater thermoregulatory and cardiovascular responses than far-infrared sessions. That doesn’t mean infrared is ineffective—it means the physiological punch differs. For a deep heat stress, traditional delivers; for a longer, milder session that still induces sweating, infrared fits.
The Evidence Gap
The strongest longevity data comes from a 2015 cohort study of over 2,300 Finnish men tracked about 20 years. Frequent traditional sauna use associated with significantly lower risks of cardiovascular disease, all-cause mortality, hypertension, stroke, and dementia. This large-scale, long-term evidence has no infrared counterpart in size or time frame.
Infrared sauna research exists, but the Mayo Clinic notes larger studies are still needed for high blood pressure, heart failure, dementia, Alzheimer’s, headache, type 2 diabetes, and arthritis. Infrared has meaningful support for chronic pain and muscle recovery—smaller reviews suggest benefits for soreness, relaxation, and sleep. These are real, but not in the same weight class as the Finnish cohort data. If your primary goal is long-term heart and longevity outcomes, traditional is the evidence-backed choice. For a gentler heat option for pain, recovery, or relaxation with less intensity, infrared is a credible alternative.
For a home unit at a reasonable price, see our roundup of the best budget infrared saunas on the market.
Heat, Sweat, and “Detox”
Both sauna types make you sweat differently. Traditional drives core temperature up quickly with ambient heat; infrared raises it gradually via radiant energy. Both produce a sweat response, but volume isn’t a proxy for value. The word “detox” oversells what evidence supports—kidneys and liver do most detoxification regardless of heat. The supported effects are heat stress, improved circulation, relaxation, and potential cardiovascular conditioning.
Session length matters more in infrared because heat is less intense—infrared sessions commonly run 30–45 minutes versus 15–20 minutes for traditional. Going too long without hydrating can lead to overheating and dehydration. The Mayo Clinic confirms no harmful effects reported with infrared specifically, but both require staying hydrated and knowing your limit.
Sauna Experience Comparison
| Factor | Traditional Sauna | Infrared Sauna |
|---|---|---|
| Heat source | Stove heats the air | Infrared panels heat body directly |
| Typical temperature | 150–194°F | 100–165°F |
| Typical session length | 15–20 minutes | 30–45 minutes |
| Evidence strength | Strong long-term cohort data (heart, mortality, dementia) | Moderate, condition-specific studies (pain, recovery) |
| Best for | Cardiovascular and longevity goals | Lower-heat tolerance, pain, relaxation |
| Respiratory use | Can be paired with steam | Dry heat only |
Which One Should You Choose?
If you can handle high heat and prioritize evidence-backed cardiovascular and longevity benefits, a traditional sauna is the well-studied pick. If you find traditional uncomfortable, want longer sessions, or target pain relief and recovery with gentler heat, an infrared unit is a practical alternative.
Both types share benefits in relaxation, sweating, and heat stress. The differences—temperature, evidence depth, physiology—are real, but neither is a bad choice. The bad choice is buying one without understanding how the heat hits you. Dehydration and overheating are possible with either if overdone, especially with underlying conditions. No sauna substitutes for medical advice, and neither has robust evidence for detox or cure-all claims. Used sensibly, both deliver real value—along different paths.
FAQs
Do infrared saunas burn fewer calories than traditional saunas?
Neither has strong evidence for meaningful calorie burn. Any caloric expenditure comes from regulating core temperature—traditional produces larger heat stress, possibly increasing energy use slightly more, but neither should be relied on for weight loss.
Can you add steam to an infrared sauna?
No, infrared produces dry heat only. Traditional saunas can pair with steam by pouring water over hot rocks, beneficial for respiratory comfort. If steam matters, traditional is the practical choice.
Which sauna type is safer for someone with high blood pressure?
Both raise heart rate and cause heat stress, so anyone with high blood pressure should check with a doctor first. The lower ambient temperature of infrared may be easier to tolerate, but medical guidance comes first.
References & Sources
- Mayo Clinic. “Infrared sauna: Is it better than a traditional sauna?” Overview of evidence and safety for both sauna types.
- PubMed. “Comparison of thermoregulatory, cardiovascular, and immune responses to hot water immersion, traditional sauna, and far infrared sauna in young healthy adults.” 2024 direct comparative physiology study.
- GoodRx. “Infrared Sauna vs. Traditional Sauna: What’s the Difference?” Consumer-oriented comparison of heat types, uses, and evidence.