Instructions:

1. Set up an incline bench at a 45-degree angle.
2. Sit on an exercise ball and roll forward until your upper back is resting on the incline bench.
3. Hold a dumbbell in each hand with your palms facing each other and your arms extended above your chest.
4. Lower the dumbbells out to the sides in a wide arc until you feel a stretch in your chest.
5. Pause for a moment, then squeeze your chest muscles to bring the dumbbells back to the starting position.
6. Repeat for the desired number of repetitions.