I have a friend who drinks no where near as much water as I do yet wants to wear one of those sauna belts. Although she sweats doesn't she need to be putting fluids BACK into her body as well? Plus are there any advantages with wearing one of those things? I tried a few times a while back but it left like burn marks on my stomach. Don't want that anymore. I figure a brisk walk and housework to the point where I sweat is good enough for me.
