As winter weather becomes colder, there is a significant increase in respiratory disease patients infected with various pathogens. In this regard, Bai Yunfei, Deputy Chief Physician of the Internal Medicine Department of the Sports Hospital of the Sports Medicine Research Institute of the General Administration of Sport of China and Ph.D. in Sports Medicine from Beijing Sport University, reminds everyone that on the one hand, personal protection should be taken to prevent cross infection; On the other hand, it is important to pay attention to improving one's own immunity through exercise, regulating respiratory system problems, and achieving good functional levels of the respiratory system through regular exercise training. "Recently, there have been many respiratory disease patients coming to the hospital outpatient department. In addition to vaccination, it is also necessary to enhance the body's resistance through regular exercise." Bai Yunfei called on everyone to develop scientific awareness, not only relying on medication treatment, but also through persistent exercise rehabilitation to prevent and control respiratory tract diseases. It is reported that a patient with allergic rhinitis in the outpatient department received systematic intervention through respiratory training, and after two months, the symptoms of nasal congestion and runny nose were effectively controlled. Athletes with exercise induced asthma also showed significant improvement in lung function after incorporating respiratory training into their daily training. "The exercise intervention of the respiratory system has been applied to patients after lung surgery, as well as patients with chronic obstructive pulmonary disease, asthma, chronic bronchitis, and allergic rhinitis. Through respiratory training, including respiratory muscle strength training, adjusting one's own breathing mode, correcting abnormal body posture, etc., the function of the respiratory mucosa and the body's oxygen uptake level can be improved, thereby enhancing one's cardiovascular function and ultimately achieving the goal of enhancing immunity," said Bai Yunfei, It is not recommended to do exercise during the acute infection period, especially for patients with fever and severe cough. Medication should be used to control symptoms first. After the body recovers to a certain level, scientific exercise training should be used to help improve respiratory system function. Training should follow the principle of gradual progress. At the beginning, low-intensity and relatively gentle breathing training was mainly used, supplemented by aerobic exercises such as jogging, swimming, cycling, etc. to increase lung capacity and improve muscle endurance. With the improvement of cardiovascular function, the time and intensity of exercise can be gradually increased. Walking can be changed to jogging, cycling can be changed from slow to fast, and respiratory muscle strength training can be added from low load exercise to high load muscle strength combination training. At the same time, before each breathing exercise, it is necessary to warm up thoroughly, mobilize the large muscle groups of the body, cooperate with breathing exercises, expand lung volume, increase oxygen inhalation, clear the respiratory tract, and improve symptoms. Respiratory training methods include abdominal breathing training, resistance breathing training, deep and slow breathing training, lip contraction breathing training, etc. But before training, it is best to seek professional doctors or sports medicine experts for scientific evaluation, Baiyun Fei said, "For example, whether the breathing pattern is correct, some people only use chest breathing instead of abdominal breathing, without using more respiratory muscles. Secondly, the body posture during breathing, whether there are bad breathing habits such as mouth breathing, etc., can all affect cardiovascular function. Professional personnel need to evaluate and then conduct targeted exercise training for the elderly." Children and other groups are concerned about their physical condition and are afraid to exercise in winter. Bai Yunfei said that if outdoor exercise is relatively difficult for the elderly, it can be changed to