Best Exercises for the Subscapularis 🧠 Want to learn more from me? Head to my profile and click the "Learn More" button to see all my latest articles and podcasts. The subscapularis is an important rotator cuff muscle that helps perform internal rotation of the shoulder, in addition to providing dynamic stability of the joint. 3 of my favorite exercises are pretty simple in nature based on EMG studies of subscapularis activity. IR at 0 and 90 degrees abduction have similar EMG activity of the s