Sleeper stretch (Posterior shoulder capsule stretch)

In a side lying position (on the side of the shoulder that is going to be stretched) with your head supported on a pillow,  have your shoulder flexed to shoulder height and your elbow bent to 90 degrees  supported on the bed/floor with your hand up to the roof, palm facing the direction of the lower body. Use the opposite hand to grab the top wrist of the shoulder being stretched and pull the arm down towards the bed/floor.