Losing weight is to reduce fat through exercise or dieting to achieve the purpose of slimming. During exercise, heat is generated in the body and discharged through the pores of the skin.

1. Eliminate metabolic wastes, such as uric acid, inorganic salts and excessive salts.

Second, keep your body temperature. Warm-blooded animals of human body, when exercising, their muscles get hot, which leads to high body temperature and will harm cells in the body. Through perspiration, take away the heat in the body and keep the body temperature.

Thirdly, the movement of human muscles is mainly the power of muscle fibers, and the original power of muscle cells is stimulated by membrane potential. That is, the accumulation of K and Na ions on the cell membrane. Excessive ion accumulation during exercise can lead to dyskinesia, such as cramps. The human body regulates the ion balance by sweating. Maintain muscle function.

Fourth, it has the function of excretion. The function of urinary system can't keep up, such as drinking plenty of water after exercise, and the filtering function of kidney can't keep up, so it drains water through sweat glands.

Bathing can not only remove sweat and oil stains, relieve fatigue, relax muscles, promote blood circulation, improve sleep, improve skin's metabolic function and disease resistance, but also treat some diseases by soaking in warm water.