During the acute pain phase, shoulder stability is the top priority. Stop pain-inducing movements (raising the arm, lifting heavy loads) and immobilize the shoulder with a sling if necessary. Starting from the recovery phase, when pain has decreased to an NRS of 4 or lower, begin strengthening exercises for the shoulder stabilizing muscles (the four rotator cuff muscles). External and internal rotation exercises using resistance bands and scapular stabilization exercises are key, and all exercises should be performed within a pain-free range. While backstroke is relatively safe during swimming, freestyle and butterfly should be avoided. Perspective of a Korean Medicine Clinic In Korean medicine, appropriate movement is believed to promote the circulation of Qi and blood and prevent the stagnation of phlegm. Excessive immobilization during the acute phase can actually worsen the stagnation of Qi and blood circulation. At Dongjedang, we guide stretching exercises tailored to the treatment stage, taking into account the meridian flow around the shoulder. Furthermore, based on the understanding that liver function governs tendon health, we recommend incorporating light full-body aerobic exercise (walking, light swimming).