How to exercise for sore muscles in the upper arm due to shoulder periarthritis

Patients with shoulder periarthritis and soreness in the upper arm muscles should perform exercises including upper arm training, towel-back rubbing exercise, bilateral arm pulling exercise, and arm lifting with elbow flexion. Attention should be paid to the intensity during exercise. The wall-climbing exercise is the most practical method, but intensity must still be controlled. The towel-back rubbing technique is also recommended—performed similarly to scrubbing one's back during a shower. Both the arm stretching exercise and the arm-raising with elbow-bending exercise require standing with feet positioned shoulder-width apart. Avoid performing unguided or overly aggressive self-rehabilitation exercises, as these may lead to an enlarged rotator cuff tear.