It is re-emphasized that aerobic exercise is a personalized training program. For severely ill discharged patients or patients with comorbidities such as hypertension, heart disease and other underlying diseases, a comprehensive assessment of their mobility in a professional rehabilitation institution is required to formulate a targeted exercise prescription. For mildly ill and ordinary discharged patients, aerobic exercise at home is recommended, and patients should follow the principle of gradual progression from low to moderate intensity, with an exercise frequency of 3-5 times/week and an exercise time of 20-40 minutes/times, including two forms of exercise: 1. The first is the lower-intensity in-situ trekking, where the patient should not lower his head or hold his breath during trekking to keep his breathing even, and the patient can The patient can adjust the intensity of the exercise by the frequency of stepping and the height of lifting the leg. Secondly, for patients with better physical conditions, they can choose the step exercise with higher intensity, prepare a wooden box with suitable height and large base area, with A foot on B foot, A foot off B foot, do not lower your head, do not hold your breath, and keep breathing evenly during the exercise. Patients can adjust the exercise intensity by lifting the frequency of legs and the height of the wooden box by themselves; 2. For patients with balance dysfunction, please choose carefully to prevent falling. During the exercise process, patients should use borg shortness of breath and fatigue rating scale for self-assessment, fatigue should be controlled within 3 points, and finger pulse oxygen clip for blood oxygen monitoring, blood oxygen is not less than 93% can be. During this process, if any discomfort is encountered such as shortness of breath, fatigue, palpitations, unsteadiness, pain, etc., the activity should be stopped in time and rest should be taken. Source: Dr. Yurai