On the one hand, sweating in summer can evaporate and dissipate heat, keeping the body temperature constant; On the other hand, it can discharge a variety of harmful metabolic wastes, such as lactic acid, carbonic acid, creatinine, urea and bacterial toxins. Therefore, as long as you can sweat and urinate in summer, you won't get sick. If you don't sweat and have less urine, it is often a precursor to summer sickness. The sweat glands of the elderly are atrophied, so they are prone to summer sickness.

So, why is sweating bad? The reason is that a small amount of sweating evaporation has the best heat dissipation effect; If sweat drips, its heat dissipation effect is not good, which will damage body fluid and vitality in vain. Because a lot of sweating will lose a lot of useful substances, resulting in insufficient potassium and sodium in the body. According to the determination, sweat also contains trace elements such as zinc, copper, chromium, molybdenum, cobalt and iodine, as well as active substances such as vitamins, so excessive sweating will lead to dehydration and weakness. In addition, a lot of sweating can concentrate blood and increase blood viscosity, which is dangerous for thrombosis and myocardial infarction induced by arteriosclerosis. Therefore, when you sweat a lot in hot summer, you should always replenish water and salt. Drink vegetable soup for three meals on weekdays and eat fruits and vegetables rich in water, vitamins and potassium salts, such as watermelon, cucumber, spinach and loofah.

2. Drink plenty of water after exercise.

Exercise in summer is bound to sweat a lot. If you exercise for a little longer, your body will lose more water and you will inevitably feel thirsty. Some people drink a lot of water after exercise. First of all, they feel happy. Second, they think that drinking more water can supplement the body's needs and balance body fluids as soon as possible. In fact, this practice is wrong. When people are exercising, a lot of blood will remain in the muscles of their limbs. If you drink plenty of water immediately after exercise, some blood vessels in the gastrointestinal tract will contract sharply, and the absorption capacity will be weakened. People will feel heavy and swollen in the stomach, which will hinder the activity of the diaphragm and affect normal breathing. Therefore, after summer exercise, you should add some water, especially salt water, and don't drink a lot of water quickly.