During exercise, all kinds of metabolism in the body are accelerated, and the metabolic rate of cells is also accelerated, generating more heat energy, so the body temperature will rise. However, in order to maintain the normal temperature range, the heat dissipation mechanism should also play a stronger role. Sweating is not an energy leak, but a way to dissipate heat from the body and a manifestation of maintaining the homeostasis of the internal environment.

When the user exercises, the heart rate increases, and more oxygen is delivered to the whole body at a faster speed through blood circulation. The average person's cardiac output is about 5 liters per minute in quiet and 30 liters per minute in strenuous exercise, which will make the user's heart blood vessels more elastic.

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Precautions:

1, the sports ground should choose a flat and open area with fresh air to exercise, which can provide enough oxygen for the human body. Because people in the process of exercise, the basic way of fitness is to breathe in a lot of fresh air from the outside. It can be said that choosing environment is an important preparation before exercise.

Don't eat too much before exercise. It is more appropriate to eat 65438+ 0~2 hours before exercise. Food needs to stay in the stomach for a long time before it can be digested and absorbed. If you eat too much before exercise, the gastrointestinal tract will swell and affect your health. Eat less food that can produce gas before exercise, such as beans, potatoes, radishes, fish and so on. Because the gas is not discharged, it will cause gas deposition and abdominal pain during exercise.

3. It is not advisable to stop suddenly during exercise, which will cause the whole body blood not to return to the heart in time, and the blood supply of the heart to the whole body organs and tissues will suddenly decrease, which will cause dizziness, nausea and vomiting, so you should continue to do relaxation exercise after exercise.

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