Introduction Shoulder impingement syndrome (SIS) is the mechanical entrapment of the supraspinatus tendon underneath the acromial arch of scapula. The narrowing of the subacromial space (SAS) was ...

Side-lying Abduction: Good for strengthening the Supraspinatus and the Serratus Anterior muscle. Lie down with ... to 45 degrees to guard against any impingement. Repeat at least 10x.