Middle-aged and elderly people can choose some aerobic exercises, such as walking, jogging, swimming, cycling, Tai Ji Chuan, aerobics and so on. These exercises can consume body fat, enhance heart and lung function, improve body immunity, and prevent diseases such as Alzheimer's disease. In addition, do at least 150-300 minutes of moderate-intensity aerobic exercise every week; Or 75- 150 minutes of high-intensity aerobic exercise; Or an equivalent combination of two intensity of physical activity.