
lie prone on swiss ball, elevate arms overhead in y position with elbows bent ninety degrees, squeezing shoulder blades
Lie on Swiss Ball such that stomach on the ball and toes on the floor and arms hanging towards the floor with holding the dumbbells. Squeeze the shoulder blades and elevate the arms towards the head with elbow flexed to 90 degree, lower the hand towards floor to starting position and repeat.
Nothing here is a prescription. Your physiotherapist decides which of these are yours, and when.