Although exercise may trigger an asthma attack, not all kinds of exercise will trigger asthma, some children with asthma can also reduce the response to trigger asthma if they can participate in some appropriate physical exercise for a long time. Children with asthma are prone to asthma attacks due to emotional stress, long-term inactivity and poor resistance to disease, and therefore are encouraged to participate in sports, such as walking, jogging, gymnastics, cycling and swimming, during the remission period. Different sports and the duration of the sports have different effects on the asthma resting place. The more strenuous the exercise, the greater the chance of triggering asthma. Strenuous running, climbing, ball games, etc. have relatively more chances of causing sports asthma; swimming, cycling, rowing, etc. have less chances of causing asthma; light sports such as walking, gymnastics, etc. have even less chances of causing asthma. The longer the duration of an exercise, the more chances of inducing asthma; generally speaking, it takes 5 to 10 minutes of vigorous exercise to trigger an exercise asthma, and less than 5 minutes to rarely cause an asthma attack. Here we need to introduce a special exercise program that is very beneficial to children with asthma – swimming. Swimming is the best exercise to enhance respiratory function. Because the density of water is hundreds of times greater than air, so the pressure on the chest cavity when moving in the water, especially when inhaling to overcome the pressure of the water to carry out, which is the same as the respiratory muscle break “weight-bearing exercise”, so swimming can make the respiratory muscles become strong and powerful, increase the mobility of the thorax, greatly increasing lung capacity. When swimming the body into a horizontal position forward. The blood circulation in the body is not affected by gravity; coupled with the water flow on the surface of the body part of the blood vessels play a massage effect of pressure pat, conducive to venous reflux, and therefore blood circulation is strong. Therefore, people who swim for a long time, the heart muscle is also developed, the heart contraction is strong. In addition, because swimming is carried out in the water, human body temperature and water temperature, there are differences between the air temperature, even in the same temperature and water temperature, human bacteria feel different, for example, when the water temperature of 20 ℃, people in the water will feel cold, but in the same temperature of the air is warm; water temperature at 30 ℃, people in the water will feel cool and comfortable, but in the same temperature of the air, it feels a little hot. Therefore, frequent swimming activities can improve the body’s thermoregulatory function and play a role in preventing respiratory diseases. In short, children with asthma often participate in suitable physical exercise, which is conducive to promoting blood circulation and metabolism, improving respiratory function, increasing muscle tone, improving the body’s ability to adapt to temperature, especially to low temperature, improving physical fitness and improving the body’s resistance to disease, and reducing asthma attacks. At the same time can be due to long-term adherence to appropriate exercise and sympathetic excitation, to counteract the release of chemically active mediators due to exercise, so as to achieve the purpose of not asthma after exercise Asthma patients should not eat sweet and fatty foods A research group led by Dr. Woodcock in Australia claimed that foods containing high sugar, high fat and high salt content, will increase the incidence of asthma. This research team had done a survey and study on 213 children and adolescents, and found that these children suffered from different degrees of respiratory diseases – asthma – due to the improper mix of optional foods. Some of these children had a higher incidence of asthma than others because they ate more than 25% more high-fat, high-sugar foods and 12% more high-salt foods, all of which tended to be more severe than others. In view of this situation, Dr. Woodcock urged people not to eat foods that are too sweet, too fatty and too much salt, especially children and teenagers. He advocates that people should eat foods that contain a lot of cod liver oil or, for example, vitamins A, C and E, which have a protective effect against the development of asthma.