This description is from Dr. Alejandro Junge in his book, Clean:
Taking regular saunas during a cleanse can maximizes elimination via the skin by boosting sweating. The most effective sauna is an infrared sauna. The newer technology heats up the user’s body instead of heating the air with steam like a traditional Finnish sauna. Infrared is radiant heat from long light waves that are not visible to the eye ( like sunlight diffused from clouds).
These rays penetrate more deeply below the the skin than the heat of a regular sauna, exciting the fat molecules into vibration so that they release toxins. It also boosts circulation, which is desirable at all times, but especially during cleanseas the blood needs to carry toxins efficiently to the liver for processing. People used to regular saunas will probably find that they sweat more in the infrared version.
It increases your heart rate and boosts metabolism. You can burn 500-700 calories in a 30 minute session.
May help with arthritis or other chronic pain issues.
You really need to experience it to see how great you feel!