The current National Fitness Guidelines issued by the State General Administration of Sport recommend that the average person should exercise for 30 to 60 minutes a day, and that the number of days of exercise per week is not recommended to be less than 3 days. Middle-aged and elderly people are recommended to choose to carry out moderate-intensity aerobic training, aerobic exercise can improve physical fitness, reduce body weight, and many middle-aged and elderly people with underlying diseases are beneficial. However, it is not recommended that patients with underlying diseases blindly engage in excessively long or intense sports to avoid too great a load on the body and induce cardiovascular and cerebrovascular emergencies. Adolescents can add a certain percentage of high-intensity aerobic exercise and muscle exercises along with moderate aerobic exercise. High-intensity aerobic exercise is beneficial to improving cardiorespiratory function, while muscle exercises can improve muscle strength and promote physical growth. Exercise time is best kept at 30 minutes to 60 minutes, and different people should pay attention to choosing the right kind of exercise for themselves. If you experience discomfort such as chest tightness and difficulty in breathing during exercise, it is recommended that you go to the hospital immediately for treatment.