Shoulder injury is a common sports injury in bodybuilding training. If not taken seriously and treated in a timely manner, it can seriously affect training and even daily life. The shoulder joint is composed of the articular glenoid of the scapula and the head of the humerus, with a large difference in the size of the articular surface, a weak and loose joint capsule, about three ligaments and tendons connecting it, and the deltoid muscle wrapped around the three sides of the shoulder crest. Shoulder injuries refer to strains, sprains, and inflammation of the above muscle groups and soft tissues such as ligaments and tendons. The shoulder joint is the main activity center of the developed upper body and upper limb muscles, and the activity and force of the shoulder joint is inseparable from the practice of pectoralis major, latissimus dorsi and triceps brachii. Therefore, inadequate preparation, inaccurate movements, excessive movements, excessive training, excessive force, etc. can easily lead to soft tissue injury in the shoulder. Minor injuries to the shoulder joint are not difficult to treat. The problem is that soft tissue injuries are not as obvious as joint dislocations, so it is important to consciously “feel” your shoulder reaction at all times during training. As soon as there is pain and other adverse sensations, the training should be noticed or stopped immediately. Then take the necessary protective measures or treatment. 1.Ice therapy: Use ice or wrap crushed ice in a paper bag to massage the injured area for 15-20 minutes 3-5 times a day. Can reduce fever, analgesia, reduce swelling. Generally within a week can be cured, . 2, gentle massage, static stretching and ultrasonic massager massage: ultrasonic massager massage has a significant effect on swelling, eliminating adhesions and calcium bruising, relieving muscle spasm and stiffness, and improving microcirculation. Generally treat 2 – 3 times a week. 3, rest: including active rest. Active rest does not refer to weight-bearing exercises such as backward neck thrusts and bench presses, but rather a “stretching exercise”, that is, the hand against the wall fingers naturally apart, climbing up the wall until the highest point. Do a dozen times repeatedly. One hand alternately do or both hands at the same time can do. Practice has proved that this is both simple and effective means of recovery. 4.Take medicine: external application, acupuncture. If there is a serious tear, strain or dislocation of the shoulder joint, or if the treatment is not significantly better for more than two weeks, you should immediately go to the hospital for diagnosis and treatment. Shoulder joint injuries are common in bodybuilding teaching and training, but not inevitable. The methods of prevention are as follows: 1. Prepare well for the activity: 5-6 minutes of whole body activity, such as running, hand exercises, targeted exercises: do a few sections of dumbbell exercises for upper body and upper limbs (such as chest expansion, side planks, shoulder ring, etc.), or use light equipment to do 2-3 sets of bench presses, arm curls, etc., so that the muscles and ligaments can reach a certain “heat” level. Tissues reach a certain “heat”, so that the operation of the joint is flexible. Some people use stretching as a preparatory activity, but this is not possible. Because it can not effectively “heat” the body, should be used with other activities, or after the preparation activities, in order to achieve the purpose. 2, the action range should not be too large: as we all know, squatting amplitude is too large easy to make the knee injury. Similarly, the shoulder joint movement amplitude is too large, too hard, but also around the joint tissue injuries. For example, when doing the supine bird, the arms should not be lower than the torso: to do the bench press, in order to slow the pressure and tension on the shoulders, push up should not “lock the shoulders”, bend the elbow when the shoulder gluteal bone can not be forward, to try to rely on the contraction of the pectoralis major and latissimus dorsi to complete the action. 3, do not train too much: bodybuilding training in the shoulder joint force frequent, heavy load, so training arrangements should strive to reasonable. For example, after the pectoralis major and latissimus dorsi are trained, it is not advisable to train the shoulder with greater intensity; when training the deltoid muscle, the bearing capacity of the shoulder should be taken into account to avoid overloading the local muscles and joints. 4, comprehensive development: to develop a scientific training plan, and strict implementation, in order to make a balanced development of the muscles of all parts of the body. This is not only a requirement for practicing bodybuilding, but also an effective guarantee to prevent sports injuries.