Sit on a stability ball with your feet flat on the ground and your back straight. Hold a dumbbell in one hand and extend your arm straight up above your head. Bend your elbow and lower the dumbbell behind your head, keeping your upper arm close to your ear. Hold the stretch for a few seconds, then return to the starting position. Repeat with the other arm.
1. Sit on a stability ball with your feet flat on the ground and your back straight.
2. Hold a dumbbell in one hand and extend your arm straight up above your head.
3. Bend your elbow and lower the dumbbell behind your head, keeping your upper arm close to your ear.
4. Hold the stretch for a few seconds, then return to the starting position.
5. Repeat with the other arm.