2. In the morning, with the rising of the sun, the garden plants in the green space begin to carry out photosynthesis, absorb carbon dioxide and release oxygen, so the carbon dioxide content in the ambient air gradually decreases, reaching the lowest point around noon; In the evening, the photosynthesis of plants stopped and began to breathe, but because of the activities of urban people and the operation of vehicles, carbon dioxide was released into the air, and carbon dioxide in the air began to rise. Therefore, in terms of the freshness of the ambient air, 10 is best to exercise in the green space from morning to 2 pm, but it is not the best time in the morning.
Morning running has certain disadvantages for children, young people, the elderly and patients with respiratory diseases. Especially in cities, air pollution is very serious.
From the point of sports medicine, fun run is more scientific. As long as you master the intensity of exercise, running at night will make people sleep better. It can also effectively lose weight.
Let's run at night. Now fun run, a white-collar worker in some cities, has become a trend. Note that the running speed must not be too fast. Proper aerobic exercise speed will make you not very tired.
5. taboo after exercise: you can't sit down immediately after exercise. After a long time, it will make the ass bigger and bigger, which will affect the appearance! It is not suitable to take a bath after exercise, especially in summer. I'm soaked through after exercise and want to take a shower. I don't know that after exercise, in order to keep your body temperature constant, blood vessels on the skin surface will expand, pores will expand and sweat will increase, which is beneficial to heat dissipation. At this time, if you take a cold bath, you will get sick because of sudden stimulation, which will make the blood vessels contract immediately. If you take a hot bath, the blood flow to the skin will continue to increase, and too much blood will flow into the muscles and skin, resulting in insufficient blood supply to the heart and brain, and it is easy to get dizzy! Drinking too much to quench thirst will inevitably lead to thirst after exercise. Some people will drink too much cold water or other drinks, which will increase the burden on the gastrointestinal tract and dilute the gastric juice. Therefore, it is not advisable to drink more water or cold drinks after exercise, otherwise it will affect the heat dissipation of body temperature and cause colds, abdominal pain or other diseases.