The purpose of performing respiratory function exercises is to change shallow and fast breathing to deep and slow effective breathing. Abdominal breathing and lip reduction breathing and other respiratory exercises can effectively strengthen the diaphragm movement, improve ventilation, reduce oxygen consumption, improve respiratory function, reduce respiratory distress, and increase activity endurance. Specific methods are as follows: 1, abdominal breathing training: take a standing position (frail people can take a semi-recumbent or sitting position), the left and right hand on the abdomen and chest, respectively. Relax the muscles of the whole body and breathe at rest. Inhale with the nose, try to hold the abdomen, the chest does not move; exhale with the mouth, while contracting the abdomen, the thorax to maintain the minimum range of activity, slow call deep inhalation, increase alveolar ventilation. Breathe 7-8 times per minute, and so on repeatedly for 10-20 minutes each time, 2 times a day. After proficiency, gradually increase the number and time, so that it becomes an unconscious breathing habit. 2, shrinking lip breathing training: inhale with the nose and exhale with the mouth, exhale with the lips shrunken like whistling, continuous slow exhalation, while contracting the abdomen. The ratio of inhalation to exhalation time is 1:2 or 1:3, and the degree of lip reduction and exhalation flow is adjusted by the patient’s choice, so that the flame of the candle at the same level 15-20cm from the lips of the mouth is tilted with the airflow and does not go out.