Infrared saunas heat the body directly using light waves rather than warming the air, operating at 120 to 150 degrees Fahrenheit - noticeably cooler than a traditional Finnish sauna. A single session at a wellness studio or spa typically costs $30 to $70, according to pricing at US infrared sauna providers. Research supports benefits for muscle recovery and cardiovascular markers; other commonly marketed claims are less well supported.
What Is an Infrared Sauna and How Does It Differ from a Traditional Sauna?
A traditional sauna - the Finnish style that most people picture - heats the air inside an insulated wood room using rocks or an electric heater. You absorb heat by sitting in air that is 150 to 195 degrees Fahrenheit. Your body's response: blood vessels dilate, heart rate increases, and you sweat to attempt to cool your core temperature.
An infrared sauna generates electromagnetic radiation in the infrared spectrum - the same type of radiant heat that the sun produces, without the ultraviolet component. The light waves penetrate the skin and heat body tissue directly, rather than heating the surrounding air. The room stays between 120 and 150 degrees Fahrenheit, which is more comfortable for people who find traditional saunas too intense.
The physiological response is largely similar to a traditional sauna - sweating, elevated heart rate, vasodilation - because the end result is an elevated core body temperature. The mechanism of getting there differs, but the body's response to being heated does not change dramatically based on the heat source.
| Feature | Infrared sauna | Traditional sauna |
|---|---|---|
| Room temperature | 120-150 degrees F | 150-195 degrees F |
| Humidity | Very low | Low (10-20%) |
| Heat source | Infrared light panels | Rocks, electric heater, or wood |
| Heat mechanism | Directly heats body tissue | Heats surrounding air |
| Sweat production | Significant | Very significant |
| Tolerance for beginners | Easier - cooler air | Harder - very hot air |
| Average session length | 20-40 minutes | 10-20 minutes |
Temperature ranges and specifications based on North American Sauna Society guidelines and infrared sauna manufacturer specifications.
The three types of infrared used in saunas are near-infrared (NIR), mid-infrared (MIR), and far-infrared (FIR). Most commercial infrared saunas use far-infrared, which penetrates tissue to a depth of about one to two inches and produces the most significant sweating response. Some providers offer "full-spectrum" saunas that combine all three. The evidence base for specific benefits of near versus far infrared is thin; the consumer-facing claims about different wavelengths exceeding the evidence should be noted as marketing.
What Are the Evidence-Based Benefits of Infrared Sauna?
The evidence for infrared sauna benefits ranges from well-supported to plausible-but-limited to unsupported. Giving you the honest breakdown:
Cardiovascular function (moderate evidence): A 2012 study in the Journal of the American College of Cardiology examined infrared sauna use in patients with congestive heart failure and found improvements in exercise tolerance and reduced hospitalizations over three weeks of daily 15-minute sessions. A Finnish study extended the cardiovascular benefits seen in traditional sauna research to infrared use, suggesting similar vasodilatory and cardiac stress-response mechanisms. The evidence is meaningful but comes from small studies.
Chronic pain and joint stiffness (moderate evidence): As mentioned in the FAQ, a controlled trial published in Clinical Rheumatology found that twice-weekly infrared sauna sessions over four weeks reduced pain scores in patients with rheumatoid arthritis and ankylosing spondylitis. Patients with fibromyalgia and chronic fatigue syndrome have shown similar modest improvements in small studies. The effect is real but not large enough to replace primary treatment.
Post-exercise muscle recovery (plausible, limited specific studies): The vasodilatory and increased blood flow effects seen in sauna research broadly apply to infrared saunas. Specific infrared sauna studies on DOMS are limited. Extrapolating from traditional sauna recovery research is reasonable but not established evidence.
Detoxification through sweat (not well-supported): One of the most common marketing claims for infrared sauna is that it "detoxifies" the body by sweating out heavy metals and toxins more effectively than a traditional sauna. The UCLA Health evidence review on this topic notes that while sweat does contain trace amounts of some metals, the kidneys and liver are the primary detoxification organs and sweat makes a negligible contribution. The claim that infrared sauna produces a uniquely superior detox effect is not supported by clinical evidence.
Weight loss (not meaningful): Caloric expenditure during a sauna session is real but modest. Any weight lost during a session is primarily water weight that is restored when you rehydrate. Long-term fat loss from sauna use is not supported by evidence independent of the cardiovascular conditioning response.
Infrared Sauna for Muscle Recovery: What the Research Shows
For post-exercise recovery, heat therapy in general - not infrared specifically - has the more established evidence base. The mechanism is well understood: heat increases blood flow to muscle tissue, which accelerates the clearance of lactate and other metabolic byproducts associated with soreness. Heat also reduces the tension in connective tissue surrounding muscles.
The specific question of whether infrared sauna has advantages over traditional sauna for recovery is not well-studied. The physiological response - elevated core temperature, vasodilation, increased circulation - is similar enough that performance differences are unlikely to be clinically meaningful.
If you train regularly and use a spa that offers either type of sauna, treating either as a post-workout recovery tool is reasonable. The infrared version may be more practical because the cooler air temperature is easier to tolerate after an intense workout session. See our comparison guide on sauna vs steam room for more on how these heat options stack up for different recovery goals.
Infrared Sauna vs Traditional Sauna: Key Differences
The practical question most people are asking is: should I pay for a standalone infrared sauna studio session, or use the traditional sauna that comes with my gym or spa membership?
If you have access to both: Try both and notice which you tolerate and enjoy more. The evidence base favors traditional sauna slightly for cardiovascular outcomes (larger, longer-duration research). Infrared is more comfortable for many people, which means more consistent use - and consistency matters more than modality for long-term wellness habits.
If infrared is your only option: The benefits are real. Cardiovascular, recovery, and relaxation outcomes from infrared are supported by enough evidence to justify the practice for healthy adults.
The premium factor: Dedicated infrared sauna studios charge $30 to $70 per session because they have built their business around this single service. Traditional saunas at gyms and full-service spas are often included in membership or day-pass pricing at no additional cost. The cost difference is worth factoring in.
Who Should Avoid Infrared Saunas?
Physician clearance required for these conditions
If you have any of the following, talk to your doctor before using an infrared sauna: cardiovascular disease or history of cardiac events, low blood pressure or hypotension, uncontrolled high blood pressure, kidney disease, and pregnancy. Medications that affect blood pressure, sweating, or fluid balance - including diuretics and antihypertensives - can interact unpredictably with the heat response. FDA consumer information on heat therapies notes that people with implanted devices including pacemakers should consult their cardiologist before using infrared therapy.
Additional considerations:
- Multiple sclerosis: Heat sensitivity is a known feature of MS and can temporarily worsen neurological symptoms. Consult your neurologist.
- Lupus: Some people with lupus find that heat triggers symptom flares. Use with caution and physician guidance.
- Active skin conditions: Open wounds, severe sunburn, and active eczema flares should heal before using any sauna.
How Much Does an Infrared Sauna Session Cost at a Spa?
Individual session pricing at dedicated infrared sauna studios runs $30 to $70 per session, based on pricing at chains including HigherDOSE, Perspire Sauna Studio, and Restore Hyper Wellness, as well as independent wellness studios. The session length at these studios is typically 30 to 50 minutes.
Membership pricing at studios that specialize in infrared sauna typically runs $80 to $150 per month for unlimited or high-frequency access, reducing the effective per-session cost to $20 to $35 if you visit regularly. The break-even calculation is similar to gym memberships: weekly use justifies the membership cost.
At full-service day spas and resort spas that include an infrared sauna in their facility, access is often included with a treatment booking or charged as part of a day-use amenity fee of $20 to $50.
For a broader look at typical costs across spa amenities and services, see our guide to average spa treatment prices and the cost breakdown in our guide to how much a spa day costs.
What to Expect During Your First Infrared Sauna Session
The room will look similar to a traditional sauna - wood panels, bench seating - but the interior is lined with infrared panels rather than rocks or heating elements. The temperature is set by the operator and typically pre-heated to around 120 to 140 degrees Fahrenheit before you enter.
First 10 minutes: The infrared heat takes time to begin producing a significant sweat response in most people because it is heating your tissue rather than the air. Many first-timers are surprised by how comfortable it feels compared to a traditional sauna and worry they are not getting a real session. You are. The sweat response begins in the second half of the session for most people.
Hydration: Drink 16 to 24 ounces of water before your session and have water available inside if the studio permits. Replenish after the session. Electrolyte drinks are worth considering for sessions over 30 minutes.
Clothing: Most infrared sauna sessions are done in minimal clothing or a towel. The studio will advise on their specific protocol. Bring a change of clothes.
Post-session: You may feel noticeably relaxed immediately after, with a mild post-session fatigue that typically resolves within an hour. Light activity is fine afterward; intense exercise immediately post-session is not recommended due to cardiovascular load.
Frequently asked questions
What makes an infrared sauna different from a regular sauna?
A traditional sauna heats the air around you to 150 to 195 degrees Fahrenheit, and your body absorbs heat from that hot air. An infrared sauna uses infrared light waves to heat your body directly, without significantly warming the air. This means the room temperature stays between 120 and 150 degrees Fahrenheit - noticeably cooler than a traditional sauna - while still producing significant sweating and cardiovascular response.
How long should you stay in an infrared sauna?
Most infrared sauna providers recommend sessions of 20 to 40 minutes for regular users, and 10 to 15 minutes for first-timers who are acclimating to the experience. Because the room temperature is lower than a traditional sauna, longer sessions are more tolerable. However, the cardiovascular and sweating response can still be substantial. Start shorter and work up. Exit immediately if you feel dizzy, lightheaded, or nauseated.
How often can you use an infrared sauna?
Daily infrared sauna use is practiced by many regular users without adverse effects when they are healthy and hydrating adequately. The research on frequency is limited; most studies have used protocols of three to four sessions per week. The practical guidance from providers is to listen to your body, hydrate before and after, and scale back if you feel fatigued. People with cardiovascular or blood pressure conditions should follow physician guidance on frequency.
Is infrared sauna safe during pregnancy?
No. Infrared sauna use during pregnancy is not recommended. The core concern with any heat therapy during pregnancy is elevated core body temperature, particularly in the first trimester. The FDA has no specific clearance for infrared sauna use during pregnancy, and most obstetric guidelines advise against extended heat exposure. Consult your obstetrician before using any sauna while pregnant.
Can infrared sauna help with chronic pain?
Several small studies suggest infrared sauna may reduce pain and improve mobility in conditions including rheumatoid arthritis, ankylosing spondylitis, and chronic musculoskeletal pain. A 2009 study in Clinical Rheumatology found that four weeks of twice-weekly infrared sauna sessions reduced pain and stiffness in patients with rheumatoid arthritis and ankylosing spondylitis. The effects were meaningful but the study was small. Infrared sauna is not a primary treatment for chronic pain but may be a useful adjunct.
How much does an infrared sauna session cost at a spa?
A single infrared sauna session at a dedicated wellness studio or spa typically costs $30 to $70, according to pricing across major US infrared sauna chains and independent wellness providers. Membership plans at studios that specialize in infrared sauna can reduce the per-session cost to $20 to $35. Some full-service day spas include infrared sauna access in a day-use amenity fee, while others price it as a standalone add-on service.