It is true that people lose weight while in the sauna. But it mostly water weight and sodium, which your body quickly replenishes when you drink water and eat anything with salt in it.
Sweating, by itself, does not burn fat. It doesn't even burn calories.
It is true that many people exercise, their muscles overheat, and they get very sweaty because their bodies releases sweat in an effort to cool them down.
The problem however is that excessive sweating can lead to dehydration, heat stroke - and even death. What happens is once a person sweats out a lot of their water reserves they have so little water left in their system that if they overheat they will start to feel the effects of heat stroke. Mild heat stroke causes confusion, headaches, dizziness. Severe heat stroke can cause a person to faint, and if left untreated it can kill them.
The problem with saunas is that due to the heat and humidity sweating doesn't actually cool the person down. So a person can overheat in a sauna very easily - and fainting is not uncommon.
All of this is exacerbated by the myth that people can lose weight by sweating a lot in the sauna. Sweating doesn't burn fat. It removes water and sodium ( and it is good for the pores ), which the body quickly replenishes later when you drink and eat - often causing the dehydrated person to over-drink and over-eat.
- Good for cleaning the pores.
- Kills bacteria (the sweat kills bacteria on the skin).
- Sweat flushes away toxic metals from the skin.
- A good way to heat up after being outside in the winter.
But burning fat is not one of the benefits.
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