Are there any studies comparing infrared and traditional saunas?

There are indeed studies comparing the benefits of infrared and traditional saunas discussed on the Huberman Lab.

Traditional Saunas

1. Frequency and Duration: Regular use of traditional saunas has been shown to reduce cardiovascular events and mortality. In one study, participants who used a sauna 2-3 times per week were 27% less likely to die from cardiovascular events compared to those who used it only once a week. Those who used it 4-7 times per week had a 50% reduction 1.
2. Heat Stress: Traditional saunas operate at higher temperatures (176-212°F) compared to infrared saunas, maximally stressing the cardiovascular system in a manner similar to moderate-intensity exercise, improving heart rate and blood pressure 2.

Infrared Saunas

1. Lower Temperature, Longer Duration: Infrared saunas typically reach about 140°F, and because of this lower temperature, users need to stay in for longer periods. Some protocols recommend staying for an hour, often combined with a wrapping in towels post-session to retain warmth 3.
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     Sauna Benefits

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2. Heavy Metal Excretion: Despite the lower temperature, infrared saunas still induce significant sweating, facilitating the excretion of heavy metals like cadmium, lead, and aluminum via sweat 3.

Mixed Studies

1. Efficacy of Both Types: Some studies from Japan using infrared saunas, such as "Weyon therapy," have shown improvements in coronary heart disease and other cardiovascular conditions, suggesting benefit from both types of saunas 3.
2. Combination: Integration of sauna use with exercise is beneficial. Cardiorespiratory fitness improves more in people who combine exercise with sauna usage compared to those who only do one of these activities 2.

In summary, while traditional saunas have more robust data supporting their use due to higher temperature-induced heat stress, infrared saunas offer significant benefits, especially for those who may not tolerate the high heat of traditional saunas. The choice can be based on individual tolerance and health goals, and combining sauna use with regular exercise can amplify the health benefits.