Shoulder pain and dysfunction are common problems in clinical practice. Many studies on other shoulder joint lesions and injuries have proved that rotator cuff injury, acromion impaction syndrome, shoulder instability, and other shoulder joint diseases are related to the shoulder blade's abnormal position and movement trajectory and abnormal changes in shoulder blade movement. Normal shoulder joint movement needs humerus joints, the acromioclavicular joints, the sternoclavicular joint, and the shoulder of the chest wall joint to coordinate with each other. When their interaction is abated, stamina and coordination become poor, weak muscle strength and stability of the shoulder blade less, poor posture and lack of core stability, and shoulder joint pain and injury on the probability increase. In rotator cuff injury, exercise therapy can also relieve pain and restore shoulder function for patients who do not meet the indications for surgery. Many studies have found that patients with rotator cuff injury have abnormal changes in scapular movement, mostly caused by force couple imbalance and shoulder-brachial rhythm disorder. The muscle groups around the shoulder joint in the shoulder joint lift, the formation of two directions of force, counterclockwise rotation of force including deltoid bundle, trapezius upper, middle, lower and serratus anterior muscle; The clockwise pair includes a posterior bundle of the deltoid, infraspinatus, teres minor, teres major, latissimus dorsi, rhomboid, etc. At the same time, they cooperate to form the shoulder-brachial rhythm and complete the 180° full radian abduction, which is produced by the 120° abduction of the glenohumeral joint and the 60° upward rotation of the scapulothoracic joint, with a motion ratio of approximately 2:1.

For patients with rotator cuff injury treated with non-surgical treatment, couples training combined with the balance of the muscles around the scapula was adopted. The range of motion of the shoulder joint, shoulder pain, and other indicators were measured and analyzed accordingly to understand the treatment effect and then standardize the treatment plan for patients with shoulder pain.

A total of 100 people with shoulder joint pain were randomly divided into two groups, each group of 50 people. A group adopts the traditional conservative treatment (control group) , another group of couple practice and adjust the rhythm of the scapula (experimental group) , and the record two groups of patients before and three months after treatment, patients with six months and 12 months treatment of VAS score, ASES score, LSST test Data, and statistical comparison.

The pain scores of the experimental and control groups significantly decreased 12 months after treatment compared with those before treatment (P<0.05) . The ASES function score in the experimental group was greatly improved after treatment compared with before treatment (P<0.05) , while there was no change in the control group. The LSST test in the experimental group under three postures was significantly improved compared with before treatment (P<0.05) , while there was no change in the control group.

The therapy of coupling exercise and scapula rhythm adjustment can relieve shoulder pain and improve function, which is better than traditional non-operative therapy.