
prone on swiss ball, hands behind head, lift and lower elbows by squeezing shoulder blades together
Lie on the stomach with legs straight forward, hands behind the head in such that elbow resting on floor. Squeeze the shoulder blade towards each other and lift the elbow off the floor. Lower the elbows towards floor to back to starting position. Repeat.
Nothing here is a prescription. Your physiotherapist decides which of these are yours, and when.