Sauna can't lose weight Sauna bath, also known as hot air bath or Finnish bath, is a common and popular way to relax. Sauna is to heat the air with an electric stove in a special cabin to create a high-temperature and dry environment, which can not only calm the muscles and joints, but also make the human body sweat a lot. If it is combined with cold water bath, that is, Finnish bath and cold water bath alternately, some toxins in the body can be excreted through the skin by relaxing and contracting skin blood vessels. Weight loss often occurs after sauna, mainly due to sweating and dehydration in the body. The so-called weight loss refers to reducing the body's fat composition, rather than losing the body's lean body weight such as water and muscles. The water in the body is relatively constant. If there is much water in the body, it will be excreted. If there is less water in the body, it will be thirsty and restless, which will cause physiological dysfunction of the body. Replenishing water can quickly improve the state of water shortage in the body and restore normal weight. Sweating after sauna has nothing to do with the burning of body fat, so sauna can't really lose weight effectively.