
lying supine with bent knees, rotate shoulder internally from 90-degree elbow position using towel support
Lie on the back with feet on the floor and knees bend and place a towel roll under the elbow and bend to 90 degrees. Rotate the arm inward such that hand move towards the body, rotate back to starting position. Repeat.
Nothing here is a prescription. Your physiotherapist decides which of these are yours, and when.