Since the beginning of the school year in early September, major hospitals continue to treat “muscle strain” patients. Recently, the reporter learned from the Joint Surgery Department of the Second Affiliated Hospital of Dalian Medical University that for more than half a month, the number of patients with “muscle strain” has been significantly higher than usual, and 80% of them are students. Some of their injuries are caused by confrontational activities such as playing basketball and soccer, while others are caused by minor sports such as “going up and down the stairs quickly” and “running and jumping during physical education classes”. “The vast majority of students who get injured do so because they don’t warm up properly before playing sports and go straight onto the field to play. ” 1, “muscle strain” is best to consult a doctor in a timely manner sophomore student Liu Liu after the start of the school year and classmates play basketball, landing sprained knee, knee joints at that time, redness, swelling, pain and other symptoms, usually sports bump in the unavoidable, so did not take it seriously, in the use of a number of topical medications, knee joints, the swelling gradually subsided, recovery after a period of time. After using some topical medicine, the swelling of the knee joint gradually subsided, and after recovering for a period of time, Liu Liu felt that his knee joint was back to normal, and he was only occasionally uncomfortable when he made a sharp stop and turn. Recently, when he played basketball again, he sprained his knee again and suffered a lot of pain, so he came to the Joint Surgery Department of the Second Hospital of the University of Medical Sciences for treatment. After MRI and physical examination, he was diagnosed with anterior cruciate ligament injury, and because Liu Liu is young and has a high demand for sports, the doctor recommended surgical treatment. Yang Liang, deputy director of the Department of Joint Surgery, told reporters: “Many patients think that a ‘sprain’ during exercise will naturally heal after a week or two of rest, which is a misunderstanding. “If you feel discomfort in your joints, muscles and ligaments after exercise, you should seek medical attention as soon as possible to prevent your condition from becoming more complicated. 2, anatomical double-bundle reconstruction makes ligament repair more stable “lasting” In daily life, ACL injury is a common knee sports injury. Yang Liang, deputy director of the introduction, many people do not take ligament injuries seriously, in fact, ACL injuries can lead to knee instability, causing the corresponding meniscus and cartilage damage, and in the long term can accelerate the degeneration of the knee joint, leading to osteoarthritis of the knee joint. Therefore, the treatment of ACL injury should be emphasized. For many years, single-bundle reconstruction technique has been mainly used for ACL injury, but after single-bundle reconstruction, there are still many patients with imaging degenerative manifestations and functional changes, and the incidence of osteoarthritis in the long term is still very high. Mr. Yang introduced that anatomical double-bundle reconstruction is more in line with the natural anatomical structure of the ACL, which restores both the anterior and posterior stability and rotational stability of the ACL, and basically replaces the biomechanical function of the ACL. The advantages of anatomical double-bundle reconstruction include high strength, low probability of re-injury and better stability. 3, prevention of sports injuries Warm-up activities to be done in the sports world, in September, people in addition to the Incheon Asian Games, tennis star Li Na’s retirement due to injury also makes the majority of fans feel regret. All along, the treatment of sports injuries has been very difficult, there are many world-renowned athletes is because of sports injuries and helplessly in the golden age of their sports farewell to the field. Therefore, Director Yang Liang suggests that prevention of sports injuries should be emphasized more than treatment. Warm up well before exercise. Preparatory activities can mobilize the excitability of the central nervous system, improve muscle strength, elasticity and flexibility, but also improve the function of the joint ligaments, enhance the elasticity of the ligaments, so that the synovial fluid in the joint cavity increases, to prevent muscle and ligament injuries. In the preparatory activities, as far as possible to make the trunk and limbs of the muscles, ligaments and joints fully active, never perfunctory. And the exercise method and the amount of exercise should also be reasonable. Scientifically increase the amount of exercise, different genders, age, level and health status of people, exercise in the grasp of the amount of exercise should be different from person to person, step by step, stop, do not be on the spur of the moment overtime overdose, exercise overdose. When people are overworked, they are most prone to injury.