Infrared vs. Traditional Sauna: Which Is Better? Experts Weigh In

There's a lot to love about saunas. For starters, they're relaxing—but they also come with a ton of benefits, such as improved cardiovascular health and immune function1. So, which is the better pick when comparing infrared saunas to traditional saunas?

Casey Kelley, M.D., founder, and medical director at Case Integrative Health in Chicago, says the difference between traditional and infrared saunas is actually fairly straightforward.

"A regular sauna heats the air in the room first, thus, heating your body within it," she explains. These saunas typically use wood or stones, which are then heated by fire, gas, or electricity.

Traditional saunas can also vary in humidity levels. "Some have very dry air, while others utilize higher levels of humidity," Kelley elaborates. 

"There are far more studies on regular saunas, but so far, studies on infrared saunas imply that the benefits may be similar," says Tanmeet Sethi, M.D., a board-certified integrative family medicine physician and clinical associate professor at the University of Washington School of Medicine. "[And] the benefits of a regular sauna are vast and quite impressive." 

Sethi explains that most research on saunas comes from Finland, where sauna usage is a part of their culture. "Benefits are mostly through the mode of improvement in cardiovascular health through reduction in blood pressure, improvement in endothelial function, reduction in inflammation, and improved arterial compliance," she says. 

Per Sethi, these benefits are linked to better sleep, cardiorespiratory function, improved immune system health, lower risk of neurocognitive disease, and "even improved pain and muscle recovery after injury."

"I think of it as a way to get cardiac exercise without movement, which is really an exciting prospect for those with less mobility," Sethi adds. 

Some of the most impressive results of tested sauna usages include improvement in all-cause mortality2, which Sethi explains as "your overall chance of living longer."

Compared to traditional saunas, one benefit of infrared saunas is that their light may penetrate deeper into the skin. "Infrared light is believed to penetrate the skin more deeply than the heat generated by traditional saunas," explains Liam Murphy, M.D., a functional doctor at Melbourne Functional Medicine in Australia. 

Murphy shares that this deeper penetration may promote improved circulation, relaxation, and cellular healing. "Proponents of far-infrared saunas claim that the deep penetration of infrared light can aid in detoxification by promoting the release of toxins stored in fat cells," he explains. 

However, Murphy also points out that more research needs to be done to fully support these benefits.

Infrared saunas should be safe to use as long as you are not pregnant or under the influence of alcohol or drugs, have a fever, or have any other existing health conditions that could be negatively affected by sauna usage. If you're not sure, it's always best to check with your medical provider.

One key benefit of traditional saunas? They've been around for thousands of years, so there's a lot more research behind them.

"Compared to infrared saunas, there has been a much greater amount of research carried out on traditional saunas," Murphy agrees. "Therefore, much more definite claims can be made about the health benefits of traditional saunas." 

Per Kelley, cons associated with traditional saunas are similar to those of infrared saunas. "Many of the cons of a traditional sauna arise from staying in too long and getting dehydrated or overheated," she says. 

She also stresses that you should steer clear of saunas in general if you're under the influence of drugs or alcohol or have a fever. "As with infrared saunas, pregnant women should also consult with their OB/GYN before use."

"While infrared saunas may prove to be superior to traditional saunas for detoxification, due to the deeper penetration of infrared rays, currently, not enough research has been performed to demonstrate this," Murphy says. 

However, research indicates that sauna use, in general, points to significant health benefits and increased longevity. "So, whether one is better than the other will ultimately come down to personal preference," he confirms. 

If you're curious if it's OK to use a combination of infrared and traditional saunas, you may be happy to hear that the answer is yes. "It is perfectly safe and effective to use both," says Murphy. 

Regarding infrared saunas, Kelley recommends starting slow. Beginners should start with 15-minute sessions or lower if they are very sensitive to heat, twice per week. "Once your body adjusts, you can increase the frequency and length of sessions," she says.

For traditional saunas, you can start with 10-minute sessions a few times weekly and then build up from there. "You can increase time and frequency as you get used to it," Kelley advises. 

Sethi says that, based on data, the "magic number" of sauna usage may be four 20-minute sessions per week at approximately 175 to 185 degrees Fahrenheit. However, she adds that research has found even one session per week beneficial. 

Good news: If you don't have a traditional sauna nearby or don't want to spend the money, you can easily recreate one right in your bathroom. 

"One way to make a DIY sauna is with your bathtub," Kelley explains. Simply close the bathroom door (seal any door cracks with a towel) and fill your bathtub with hot water. The steam will then fill the room. 

"Breathe deeply and relax!" Kelley says. "You can stay in for about 10 to 15 minutes—just make sure you hydrate when you get out."

If you're interested in bringing the infrared sauna home but don't have the space, Kelley points out that infrared sauna blankets are a great substitute. 

Kelley reiterates that hydration is one of the most important things to consider when using saunas. "You'll be sweating a lot, so prepare your body by drinking a glass of water or two before use," she says. 

Per Kelley, you may want to remove any jewelry as metal may heat up quickly in the sauna. "Also, avoid wearing anything tightfitting," she adds, "Choose something loose and comfortable!" 

Pregnant women may want to avoid both infrared and traditional saunas, as well as infrared sauna blankets and hot tubs. You should also not use any form of sauna, including an infrared sauna blanket if you're under the influence of drugs and alcohol or have a high fever. 

Kelley also adds that those with heat intolerance or orthostatic blood pressure conditions must exercise extreme caution in saunas and check in with their doctor before using one. 

"Certain medications can also affect your response [to saunas]," Kelley mentions. "So again, please talk to your physician prior to use." 

Both traditional and infrared saunas can have positive effects on your health. Sauna sessions have been linked with improved mood, increased immune function, and better sleep quality, to name a few. If you're interested in picking up a sauna for yourself, take a look at our best infrared saunas roundup.