INFRARED SAUNA: WHAT THE RESEARCH ACTUALLY SAYS

Infrared saunas have become one of the more talked-about recovery tools in the fitness world. Walk into any serious training facility and you're likely to find one. But what does the research actually say? And why did we include one at The Forge?

Let's separate signal from noise.

How infrared saunas differ from traditional saunas

Traditional saunas heat the air around you to very high temperatures, often 180-200 degrees Fahrenheit, which then heats your body. Infrared saunas use infrared light to heat your body directly, at lower air temperatures, typically 120-150 degrees. The result is a deep, penetrating heat that many people find more comfortable and easier to tolerate for longer sessions.

What the research actually supports

Cardiovascular health is one of the strongest areas of evidence. A long-term Finnish study published in JAMA Internal Medicine followed over 2,000 middle-aged men for 20 years and found that frequent sauna use was associated with significantly lower risk of cardiovascular disease and all-cause mortality. The mechanisms appear to include improved blood vessel function, reduced blood pressure, and cardiovascular conditioning effects similar to moderate exercise.

Recovery and muscle soreness is more mixed but generally positive. Some studies show reduced delayed-onset muscle soreness after intense training, improved perceived recovery, and faster return to performance. The heat stress appears to promote blood flow to muscles and may reduce inflammation markers.

Mental health and stress reduction has solid support. Heat exposure triggers the release of endorphins and other mood-regulating compounds. Regular sauna users consistently report reduced stress, improved mood, and better sleep quality.

What the research doesn't fully support yet

Weight loss claims are largely exaggerated. You'll sweat out water weight, which returns when you rehydrate. The caloric burn from a sauna session is real but modest. Sauna is a recovery tool, not a fat loss strategy.

Detoxification claims are mostly marketing. Your liver and kidneys handle detoxification. Sweating does excrete some trace compounds, but the effect is minor compared to what your body does naturally.

Why we included one at The Forge

We included the infrared sauna because the evidence for cardiovascular health and recovery is genuinely compelling, and because our athletes asked for it. After a hard training session, 20-30 minutes in the sauna is a legitimate recovery tool that most of our members use regularly.

It's included with all memberships. Use it.