Overweight, abnormal blood glucose and blood lipids, sedentary in front of the computer leading to neck, chest, waist and back pain, has become a common affluent disease of modern people. In order to pursue health, it is not wrong to participate in various physical exercise. However, in recent times, we have seen many patients with knee injuries caused by improper exercise, so it is necessary to popularize the knowledge of knee injuries. Primary and secondary school students, due to the fact that sports scores are included in the total score, many students close to the exam suddenly increase the amount of exercise, such as running 800 meters for a few days in a row, a few sets of frog jumps in a row, resulting in joint swelling, pain, synovitis, or even cartilage and bone contusion, when the doctor usually recommends rest, or even need to support braking. Originally wanted to quickly improve sports performance, the results of the desire for speed, and even need to go to school family members to send. Suggestions: Gradual progress, the most important thing is to persist, do a good job of warming up, improve sports performance is not an overnight thing. College students and white-collar workers just work more leisure time, to participate in soccer, basketball and other confrontational sports, naturally avoid collisions, sprains. Suggestion: Once an injury occurs, call for help immediately and move to an open area. If there is knee pain, swelling, should be immediately braked, cold compresses, seek professional help. Do not move on your own, or even endure the pain to continue the game, which is likely to aggravate the injury, or even leave lifelong regrets. Middle-aged people work under greater pressure, often wait until overweight before remembering to lose weight through physical exercise. Badminton has become one of everyone’s favorite forms of exercise and logically one of the most common causes of knee injuries. In middle age, the joints themselves have begun to deteriorate, with cartilage, meniscus, and cruciate ligaments degenerating to varying degrees. The joint tissues are less tolerant to exercise than young people, and meniscus injuries and cruciate ligament tears often occur. Suggestion: If there is pain and discomfort in the knee joint after exercise, you need to reduce the intensity of exercise or change the mode of exercise, such as choosing swimming, jogging and other mild aerobic exercise. Once the knee joint instability or interlocking (that is, playing soft legs or clicking sound and other strange sounds), early medical attention. When meniscus injury is diagnosed and there are indications for surgery, minimally invasive arthroscopic surgery should be performed as soon as possible to avoid further aggravation of meniscus injury, leading to increased wear and tear of articular cartilage. Joint degeneration is more pronounced in the elderly, and it is especially important to choose the appropriate exercise. Suggestions: the elderly are not suitable for stair climbing, mountain climbing, shuttlecock and other exercises, to avoid squatting, jumping and other actions. As for everyone’s favorite square dance, or to be moderate, the range of action should be appropriate, choose the appropriate dance for their age group.