The practice of bathing in heat for health and purification goes back centuries. More recently, the infrared sauna, an alternative to the traditional Finnish-style sauna, has taken the functional medicine world by storm.
Saunas are used for various purposes, including detoxification, relaxation, and, increasingly, to help treat or prevent various health conditions. Studies have shown that regular sauna use can improve pain and mood, reduce the risk of developing heart disease and Alzheimer’s, and even increase longevity [1, 2, 3 Trusted SourcePubMedGo to source].
In this article, we’ll explore the health benefits and effects of saunas, the differences between infrared and conventional saunas, how infrared saunas work, and whether or not they live up to the hype.
Infrared Saunas vs. Traditional Saunas: A Snapshot
Let’s take a quick look at how infrared saunas and traditional saunas compare.
Traditional saunas heat the air first.
Infrared saunas use infrared light to penetrate and heat the body directly.
Infrared saunas use less heat.
Infrared sauna benefits:
Easier to use at home
Less expensive to purchase
Infrared sauna disadvantages:
Possible marketing influence
Potential electromagnetic field (EMF) risks
What to Expect From a Sauna Session
Before we dive into more details on the differences between infrared and traditional saunas, let’s cover a few sauna basics. Saunas vary in terms of their heating methods, temperatures, and features, but the general idea is the same.
A sauna session can last anywhere from 5 to 30 minutes. While you’re in the sauna, a number of different things are going on in your body. Some of them are noticeable: You’ll sweat, you may feel your heart rate increase, and you might feel relaxed or experience an increased sense of clarity.
Behind the scenes, the short-term exposure to extreme heat creates a positive kind of stress for your body. This stress leads to increased cellular repair, improved cardiovascular function, and enhanced stress tolerance, among other physiological benefits [4, 5 Trusted SourcePubMedGo to source].
Some protocols involve alternating between the heat of a sauna and cold exposure through pools or showers, which is thought to create additional positive stress.
Certain gyms, spas, and health centers offer sauna treatments. You can also purchase an infrared sauna for your home.
Benefits of Saunas
Some people compare the way they feel after infrared sauna sessions to the way they feel after a moderate exercise session. In fact, sauna use and exercise have many similar physiological effects and benefits.
Here are some of the greatest benefits of general sauna use:
Stress adaptation. Short-term and controlled exposure to extreme heat (or cold) may offer a number of health and wellness benefits through a stress adaptation response known as hormesis . Your body responds to the stress of the heat by initiating an antioxidant and cellular repair response with widespread benefits. With regular sauna use, your body is also thought to become better able to tolerate future stressors, including but not limited to extreme heat.
Brain health. Sauna use, especially when frequent, has been associated with a reduced risk of developing neurodegenerative diseases including Alzheimer’s disease and dementia [3 Trusted SourcePubMedGo to source].
Cardiovascular response. Heat exposure from sauna use has numerous effects on the cardiovascular system. Heart rate and cardiac output (the amount of blood your heart pumps) increase, blood pressure decreases, and blood flow improves [11 Trusted SourcePubMedGo to source].
Relaxation and mood improvement. Sauna therapy leads to the release of feel-good chemicals like endorphins, which may contribute to improved mood or feelings of wellbeing after a session [25 Trusted SourcePubMedGo to source]. Beyond these physiological effects, the very act of sitting still in a sauna for 20-30 minutes may be relaxing or even meditative.
Are Infrared Saunas Better Than Conventional Saunas?
Infrared sauna use is getting a lot of hype, so we looked at the research to see if the benefits of infrared saunas are better than or different from the benefits of traditional saunas.
A 2018 systematic review of 40 studies involving more than 3,800 participants stated that, based on the available evidence, no conclusions could be drawn comparing the benefits of traditional and infrared saunas .
Benefits of Infrared Saunas vs. Conventional Saunas
Most studies have only looked at only conventional or infrared saunas, so we can’t determine whether or not one type offers more powerful benefits.
Instead, we’ll briefly compare the studied benefits of both for heart disease, longevity, brain function, mental health, fatigue, and chronic pain.
Here’s a quick summary of what the research shows.
Researched Health Benefits
Heart Disease and Longevity
Chronic Pain and Fatigue
Let’s break down the available research on both types of saunas across these areas of health.
A second study of 1621 Finnish men between the ages of 42 and 60 found that regular traditional sauna use was associated with a reduced risk of hypertension (high blood pressure) after almost 25 years [26 Trusted SourcePubMedGo to source].
Two 2018 systematic reviews of clinical trials and observational studies found that infrared sauna use and Waon therapy (a type of infrared sauna therapy common in Japan) improved several (but not all) markers associated with chronic heart failure [15, 16 Trusted SourcePubMedGo to source].
A 2016 clinical trial of 149 patients with congestive heart failure showed that just two weeks of Waon infrared sauna therapy improved disease status, walking distances, and heart sizes [11 Trusted SourcePubMedGo to source].
A 2017 prospective study that followed more than 2,300 Finnish men for over 20 years found that regular traditional sauna use was associated with a reduced risk of developing dementia and Alzheimer’s disease [3 Trusted SourcePubMedGo to source].
These benefits were even stronger with more frequent use. Those who used the sauna 4-7 times per week were found to have a 65%-66% lower risk of developing Alzheimer’s or dementia when compared with those who used the sauna once a week.
A 2018 study following 2,138 Finish men for more than 20 years found that frequent traditional sauna use was associated with a reduced risk of developing psychotic disorders .
A 2016 clinical trial of 93 healthy adults with non-medicated major depressive disorder found that just one session of whole-body hyperthermia (heat delivered to the body by infrared lights) led to reduced depression for six weeks [20 Trusted SourcePubMedGo to source].
Chronic Pain and Fatigue
A small clinical trial on female patients with fibromyalgia found that 12 weeks of infrared sauna therapy combined with underwater exercises led to significant reductions in pain [21 Trusted SourcePubMedGo to source].
A small study on patients with rheumatoid arthritis and ankylosing spondylitis (inflammatory arthritis of the spine) found that four weeks of infrared sauna use led to significantly reduced pain and stiffness [22 Trusted SourcePubMedGo to source].
Two small clinical trials have shown improvements in fatigue and wellbeing among patients with chronic fatigue syndrome following the use of Waon infrared sauna therapy for four weeks [23, 24 Trusted SourcePubMedGo to source].
Although we can’t conclude that one type of sauna therapy is better across the board, there are a number of differences to consider when making a decision about saunas. We’ll explore several of these differences below.
Differences Between Infrared and Traditional Saunas
The primary differences between traditional (or conventional) saunas and infrared saunas are their temperatures and heating methods.
Traditional saunas, which originated in Finland, were once heated by wood fires. Today, many Finnish-style saunas use conventional electric heating
Conventional saunas work by heating the air in the sauna to high temperatures ranging from 176 to over 200 degrees F . The air is heated first, followed by your skin, and eventually, your core body temperature increases.
In comparison, infrared saunas work by emitting infrared radiation or light. Infrared light is invisible to the human eye and is experienced as heat. These wavelengths of infrared light directly penetrate the skin, heating your body directly without significantly heating up the air.
The range of heat used in infrared saunas is usually between 113 to 140 degrees Fahrenheit . In other words, the highest temperature used in an infrared sauna is more than 30 degrees lower than the lowest temperature used in a traditional sauna.
Does Less Heat Mean Fewer Health Benefits?
The short answer is that we don’t know yet how reduced heat impacts health benefits.
Some research, including a long-running study on more than 2,000 Finnish men, has demonstrated that higher levels of heat (at least 174 degrees F) are especially effective at reducing cardiovascular related mortality, all-cause mortality, and incidence of Alzheimer’s disease .
However, these findings are within the confines of the traditional model, in which the air is heated first and the body heats up as a result.
The theory of infrared saunas is that by using infrared light directly, heat can penetrate the body more deeply, producing the same benefits at lower temperatures.
Which Type of Sauna Is Best?
The available research shows that both conventional and infrared saunas are generally safe and offer numerous health benefits.
With that in mind, there are a few differences between infrared saunas and traditional saunas that may help you to make a decision.
Benefits of Infrared Saunas
Increased comfort. Because the air inside an infrared sauna gets less hot, you may be able to spend more time inside with less discomfort. If you know that you have difficulty withstanding high levels of heat, this option may make it easier for you to reap the benefits of a longer sauna session.
Easier to use at home. For use at home, the infrared option may be the most practical, as it is designed to heat your body directly, without as great of an effect on the air around you.
Less expensive to purchase. If you’re considering purchasing a sauna for your home, infrared models are often available at a much lower cost than traditional saunas.
Disadvantages of Infrared Saunas
Limited research. Although a growing body of evidence supports the health benefits of infrared saunas, many of the largest and highest quality studies on disease prevention and longevity have focused on traditional, Finnish-style sauna bathing.
Possible marketing influence. Given the limited amount of available research, it’s important to be cautious when evaluating claims made by or influenced by the infrared sauna industry. Some infrared sauna manufacturers may have relationships with influencers in the functional medicine field, making it hard to separate fact from hyperbole.
Potential electromagnetic field (EMF) risks. Theoretical concerns have been raised about possible harmful EMF exposure with the use of certain types of infrared saunas. However, harmful effects as a result of EMF exposure from saunas have not been documented in the medical literature. If this is a concern, some infrared sauna companies offer or provide EMF testing or use methods that may cancel out EMFs.
Far-Infrared vs. Near-Infrared Saunas
Not all infrared saunas are the same. Beyond size, style, and cost, the main difference between different kinds of infrared saunas is the type of wavelengths they emit.
The spectrum of infrared light consists of near-, middle- and far-infrared wavelengths.
There are benefits associated with all three types of wavelengths.
Far-infrared: Far-infrared wavelengths penetrate the most deeply past the skin and into the body, making far infrared saunas the preferred choice for many who are looking for the most powerful healing benefits.
Middle-infrared: Mid-infrared wavelengths are thought to help reduce inflammation and increase blood circulation.
Near-infrared: The more surface-level effects of near-infrared wavelengths may have their own benefits, including potential skin healing.
Some infrared saunas, referred to as “full spectrum” models, emit all three types of wavelengths through separate heating elements.
Risks Associated With Sauna Use
Sauna therapy, including infrared sauna use, has been shown to be generally safe and well tolerated . However, some side effects have been reported. Side effects are generally mild and temporary, occurring only during or shortly after use. These include:
Due to the short-term effect of sauna use on sperm count and motility, men who are concerned about fertility may wish to avoid or reduce sauna use while trying to conceive. Avoiding saunas for six months has been shown to reverse the negative effects on sperm [31 Trusted SourcePubMedGo to source].
Certain people may be at higher risk than others for experiencing adverse effects as a result of heat therapy. If any of these risk factors apply to you, seek medical advice before starting regular sauna use.
Known heat sensitivity
Chronic pain conditions including rheumatoid arthritis, chronic fatigue syndrome, and ankylosing spondylitis 
The use of certain medications may also affect your response to sauna therapy and should be discussed with a practitioner.
How to Reduce the Risk of Side Effects
There are a few steps you can take that may help to reduce the risk of side effects.
Drink water. Always drink plenty of water before and/or during your sauna session to avoid dehydration, as you will lose fluids through sweat.
Sugahara Y., Ishii M., Muta H., Egami K., Akagi T., Matsuishi T. Efficacy and safety of thermal vasodilation therapy by sauna in infants with severe congestive heart failure secondary to ventricular septal defect. American Journal of Cardiology. 2003;92(1):109–113. doi: 10.1016/S0002-9149(03)00483-1.
Laukkanen T, Laukkanen JA, Kunutsor SK. Sauna Bathing and Risk of Psychotic Disorders: A Prospective Cohort Study. Med Princ Pract. 2018;27(6):562-569. doi: 10.1159/000493392. Epub 2018 Sep 2. PMID: 30173212; PMCID: PMC6422146.
Laukkanen T, Kunutsor S, Kauhanen J, Laukkanen JA. Sauna bathing is inversely associated with dementia and Alzheimer’s disease in middle-aged Finnish men. Age Ageing. 2017 Mar 1;46(2):245-249. doi: 10.1093/ageing/afw212. PMID: 27932366. Trusted SourcePubMedGo to source
Mattson MP. Hormesis defined. Ageing Res Rev. 2008 Jan;7(1):1-7. doi: 10.1016/j.arr.2007.08.007. Epub 2007 Dec 5. PMID: 18162444; PMCID: PMC2248601.
Arena R, Guazzi M, Lianov L, Whitsel L, Berra K, Lavie CJ, Kaminsky L, Williams M, Hivert MF, Cherie Franklin N, Myers J, Dengel D, Lloyd-Jones DM, Pinto FJ, Cosentino F, Halle M, Gielen S, Dendale P, Niebauer J, Pelliccia A, Giannuzzi P, Corra U, Piepoli MF, Guthrie G, Shurney D; AHA Writing Group, Arena R, Berra K, Dengel D, Franklin NC, Hivert MF, Kaminsky L, Lavie CJ, Lloyd-Jones DM, Myers J, Whitsel L, Williams M; ESC/EACPR Writing Group, Corra U, Cosentino F, Dendale P, Giannuzzi P, Gielen S, Guazzi M, Halle M, Niebauer J, Pelliccia A, Piepoli MF, Pinto FJ; ACPM Writing Group, Guthrie G, Lianov L, Shurney D. Healthy lifestyle interventions to combat noncommunicable disease-a novel nonhierarchical connectivity model for key stakeholders: a policy statement from the American Heart Association, European Society of Cardiology, European Association for Cardiovascular Prevention and Rehabilitation, and American College of Preventive Medicine. Eur Heart J. 2015 Aug 14;36(31):2097-2109. doi: 10.1093/eurheartj/ehv207. Epub 2015 Jul 1. PMID: 26138925. Trusted SourcePubMedGo to source
Genuis SJ, Sears ME, Schwalfenberg G, Hope J, Bernhoft R. Clinical detoxification: elimination of persistent toxicants from the human body. ScientificWorldJournal. 2013 Jun 6;2013:238347. doi: 10.1155/2013/238347. PMID: 23844383; PMCID: PMC3691527. Trusted SourcePubMedGo to source
Sears ME, Kerr KJ, Bray RI. Arsenic, cadmium, lead, and mercury in sweat: a systematic review. J Environ Public Health. 2012;2012:184745. doi: 10.1155/2012/184745. Epub 2012 Feb 22. PMID: 22505948; PMCID: PMC3312275. Trusted SourcePubMedGo to source
Genuis SK, Birkholz D, Genuis SJ. Human Excretion of Polybrominated Diphenyl Ether Flame Retardants: Blood, Urine, and Sweat Study. Biomed Res Int. 2017;2017:3676089. doi: 10.1155/2017/3676089. Epub 2017 Mar 8. PMID: 28373979; PMCID: PMC5360950. Trusted SourcePubMedGo to source
Genuis SJ, Beesoon S, Lobo RA, Birkholz D. Human elimination of phthalate compounds: blood, urine, and sweat (BUS) study. ScientificWorldJournal. 2012;2012:615068. doi: 10.1100/2012/615068. Epub 2012 Oct 31. PMID: 23213291; PMCID: PMC3504417. Trusted SourcePubMedGo to source
Ross GH, Sternquist MC. Methamphetamine exposure and chronic illness in police officers: significant improvement with sauna-based detoxification therapy. Toxicol Ind Health. 2012 Sep;28(8):758-68. doi: 10.1177/0748233711425070. Epub 2011 Nov 16. PMID: 22089658; PMCID: PMC3573677.
Tei C, Imamura T, Kinugawa K, Inoue T, Masuyama T, Inoue H, Noike H, Muramatsu T, Takeishi Y, Saku K, Harada K, Daida H, Kobayashi Y, Hagiwara N, Nagayama M, Momomura S, Yonezawa K, Ito H, Gojo S, Akaishi M, Miyata M, Ohishi M; WAON-CHF Study Investigators. Waon Therapy for Managing Chronic Heart Failure - Results From a Multicenter Prospective Randomized WAON-CHF Study. Circ J. 2016;80(4):827-34. doi: 10.1253/circj.CJ-16-0051. Epub 2016 Mar 18. PMID: 27001189. Trusted SourcePubMedGo to source
Kunutsor SK, Khan H, Laukkanen T, Laukkanen JA. Joint associations of sauna bathing and cardiorespiratory fitness on cardiovascular and all-cause mortality risk: a long-term prospective cohort study. Ann Med. 2018 Mar;50(2):139-146. doi: 10.1080/07853890.2017.1387927. Epub 2017 Oct 16. PMID: 28972808. Trusted SourcePubMedGo to source
Laukkanen JA, Laukkanen T, Khan H, Babar M, Kunutsor SK. Combined Effect of Sauna Bathing and Cardiorespiratory Fitness on the Risk of Sudden Cardiac Deaths in Caucasian Men: A Long-term Prospective Cohort Study. Prog Cardiovasc Dis. 2018 Mar-Apr;60(6):635-641. doi: 10.1016/j.pcad.2018.03.005. Epub 2018 Mar 16. PMID: 29551418. Trusted SourcePubMedGo to source
Laukkanen T, Khan H, Zaccardi F, Laukkanen JA. Association between sauna bathing and fatal cardiovascular and all-cause mortality events. JAMA Intern Med. 2015 Apr;175(4):542-8. doi: 10.1001/jamainternmed.2014.8187. PMID: 25705824. Trusted SourcePubMedGo to source
Hussain J, Cohen M. Clinical Effects of Regular Dry Sauna Bathing: A Systematic Review. Evid Based Complement Alternat Med. 2018 Apr 24;2018:1857413. doi: 10.1155/2018/1857413. PMID: 29849692; PMCID: PMC5941775.
Källström M, Soveri I, Oldgren J, Laukkanen J, Ichiki T, Tei C, Timmerman M, Berglund L, Hägglund H. Effects of sauna bath on heart failure: A systematic review and meta-analysis. Clin Cardiol. 2018 Nov;41(11):1491-1501. doi: 10.1002/clc.23077. Epub 2018 Nov 21. PMID: 30239008; PMCID: PMC6489706. Trusted SourcePubMedGo to source
Pilch W., Szyguta Z., Torii M. Effect of the sauna-induced thermal stimuli of various intensity on the thermal and hormonal metabolism in women. Biology of Sport. 2007;24(4):357–373.
Imamura M, Biro S, Kihara T, Yoshifuku S, Takasaki K, Otsuji Y, Minagoe S, Toyama Y, Tei C. Repeated thermal therapy improves impaired vascular endothelial function in patients with coronary risk factors. J Am Coll Cardiol. 2001 Oct;38(4):1083-8. doi: 10.1016/s0735-1097(01)01467-x. PMID: 11583886. Trusted SourcePubMedGo to source
Masuda A, Nakazato M, Kihara T, Minagoe S, Tei C. Repeated thermal therapy diminishes appetite loss and subjective complaints in mildly depressed patients. Psychosom Med. 2005 Jul-Aug;67(4):643-7. doi: 10.1097/01.psy.0000171812.67767.8f. PMID: 16046381. Trusted SourcePubMedGo to source
Janssen CW, Lowry CA, Mehl MR, Allen JJ, Kelly KL, Gartner DE, Medrano A, Begay TK, Rentscher K, White JJ, Fridman A, Roberts LJ, Robbins ML, Hanusch KU, Cole SP, Raison CL. Whole-Body Hyperthermia for the Treatment of Major Depressive Disorder: A Randomized Clinical Trial. JAMA Psychiatry. 2016 Aug 1;73(8):789-95. doi: 10.1001/jamapsychiatry.2016.1031. Erratum in: JAMA Psychiatry. 2016 Aug 1;73(8):878. PMID: 27172277. Trusted SourcePubMedGo to source
Matsumoto S, Shimodozono M, Etoh S, Miyata R, Kawahira K. Effects of thermal therapy combining sauna therapy and underwater exercise in patients with fibromyalgia. Complement Ther Clin Pract. 2011 Aug;17(3):162-6. doi: 10.1016/j.ctcp.2010.08.004. Epub 2010 Sep 25. PMID: 21742283. Trusted SourcePubMedGo to source
Oosterveld FG, Rasker JJ, Floors M, Landkroon R, van Rennes B, Zwijnenberg J, van de Laar MA, Koel GJ. Infrared sauna in patients with rheumatoid arthritis and ankylosing spondylitis. A pilot study showing good tolerance, short-term improvement of pain and stiffness, and a trend towards long-term beneficial effects. Clin Rheumatol. 2009 Jan;28(1):29-34. doi: 10.1007/s10067-008-0977-y. Epub 2008 Aug 7. PMID: 18685882. Trusted SourcePubMedGo to source
Keiko AMANO, Ryoko YANAGIHORI, Chuwa TEI. Waon Therapy is Effective as the Treatment of Myalgic Encephalomyelitis/Chronic Fatigue Syndrome. The Japanese Society Balneology, Climatology and Physical Medicine. 2015. Volume 78, Issue 3, p. 285-302. https://doi.org/10.11390/onki.78.285.
Soejima Y, Munemoto T, Masuda A, Uwatoko Y, Miyata M, Tei C. Effects of Waon therapy on chronic fatigue syndrome: a pilot study. Intern Med. 2015;54(3):333-8. doi: 10.2169/internalmedicine.54.3042. PMID: 25748743. Trusted SourcePubMedGo to source
Miragem AA, Homem de Bittencourt PI Jr. Nitric oxide-heat shock protein axis in menopausal hot flushes: neglected metabolic issues of chronic inflammatory diseases associated with deranged heat shock response. Hum Reprod Update. 2017 Sep 1;23(5):600-628. doi: 10.1093/humupd/dmx020. PMID: 28903474. Trusted SourcePubMedGo to source
Zaccardi F, Laukkanen T, Willeit P, Kunutsor SK, Kauhanen J, Laukkanen JA. Sauna Bathing and Incident Hypertension: A Prospective Cohort Study. Am J Hypertens. 2017 Nov 1;30(11):1120-1125. doi: 10.1093/ajh/hpx102. PMID: 28633297. Trusted SourcePubMedGo to source
Laukkanen T, Khan H, Zaccardi F, Laukkanen JA. Association Between Sauna Bathing and Fatal Cardiovascular and All-Cause Mortality Events. JAMA Intern Med. 2015;175(4):542–548. doi:10.1001/jamainternmed.2014.8187
Masuda A., Koga Y., Hattanmaru M., Minagoe S., Tei C. The effects of repeated thermal therapy for patients with chronic pain. Psychotherapy and Psychosomatics. 2005;74(5):288–294. doi: 10.1159/000086319.
Tei C., Imamura T., Kinugawa K., et al. Waon therapy for managing chronic heart failure – Results from a multicenter prospective randomized WAON-CHF study. Circulation Journal. 2016;80(4):827–834. doi: 10.1253/circj.CJ-16-0051.
Shinsato T, Miyata M, Kubozono T, Ikeda Y, Fujita S, Kuwahata S, Akasaki Y, Hamasaki S, Fujiwara H, Tei C. Waon therapy mobilizes CD34+ cells and improves peripheral arterial disease. J Cardiol. 2010 Nov;56(3):361-6. doi: 10.1016/j.jjcc.2010.08.004. Epub 2010 Sep 16. PMID: 20843662. Trusted SourcePubMedGo to source
Garolla A, Torino M, Sartini B, Cosci I, Patassini C, Carraro U, Foresta C. Seminal and molecular evidence that sauna exposure affects human spermatogenesis. Hum Reprod. 2013 Apr;28(4):877-85. doi: 10.1093/humrep/det020. Epub 2013 Feb 14. PMID: 23411620. Trusted SourcePubMedGo to source
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