Rotator Cuff Dumbbell Raise

Instructions

1. 
   Stand upright with a dumbbell in each hand, to help with balance, and keep one arm parallel with the floor, elbow bent 90 degrees.
2. 
   Keeping your core tight and the rest of your body still, twist the bent arm up to bring the dumbbell upward in an arc toward the ceiling, then return it deliberately along the same path.