Summer is perhaps the most “dynamic” season of the year, in addition to a variety of water sports, many people will arrange field trips in the summer, summer activities, playing ball in the sun is not uncommon for young people. Exercise only in moderation, the premise of the right amount is beneficial to the body, because the exercise is not reasonable, resulting in a lot of sports injuries, some sports injuries are irreversible, serious and even cause sudden death, so it is best to open a personal exercise prescription before exercise. Reasonable exercise is healthy swimming is one of the most popular sports in the summer, many people like to take the breaststroke position, but if your knee was a health hazard, it is not suitable for breaststroke; people with shoulder and neck problems, to avoid swimming freestyle; if the ankle disease, then freestyle, backstroke and butterfly are not suitable for you. People who usually lack systematic exercise or whose physique is already weak are not suitable for more strenuous exercise, and choosing exercise programs according to health condition is the basic requirement for safe exercise. In a full understanding of their own health status based on the ability to choose the right exercise program is an important aspect of reasonable exercise. Some playgrounds now often provide some exciting, thrilling outdoor activities, in the time to carry out must have the guidance of professional sports personnel, some would have been better to give up potential illnesses, some young people due to the absence of symptoms, the body may have hidden diseases they do not know, rashly trying to difficult sports often lead to accidents, so for too thrilling, exciting projects to be carefully selected. Another aspect of sensible exercise is the right amount of exercise. Each person’s physical condition is different, it is difficult to have a universally applicable standard amount of exercise. Exercise should be good at listening to the body’s voice. The right amount of exercise is generally more comfortable, not tired, soreness, fatigue are the body requires rest and the signal, this time should be stopped in time. Summer temperatures are high, the outdoor temperature of 35 ℃ or more, it is not very suitable for outdoor exercise. But this criterion is not absolute, specific to the individual or to whether the degree of comfort. Even if you can adapt to the high temperature, you should pay attention to rest and drink small amounts of water at any time to replenish water and electrolytes. Personalized exercise prescription As each person’s physical condition is different, the specific appropriate exercise program is very individual, to know what kind of exercise is suitable for you, the exact exercise intensity is how much, it is best to help you develop a personalized moderate exercise prescription through a special exercise test, to carry out purposeful, planned scientific exercise. The development of exercise prescriptions can generally be found in the orthopedic or sports medicine departments of major hospitals, and now there are also professional organizations that provide personalized exercise prescription services. Since there are many considerations for exercise in patients with chronic diseases, it is best to get a specialist’s opinion before tailoring an exercise prescription.