dumbbell fly on exercise ball

Sit on an exercise ball and hold a dumbbell in each hand. Walk your feet forward and roll your body down until your head, neck, and upper back are supported by the ball. Extend your arms straight up above your chest, palms facing each other. Bend your elbows slightly and lower your arms out to the sides in a wide arc until you feel a stretch in your chest. Pause for a moment, then reverse the movement and squeeze your chest muscles as you bring the dumbbells back to the starting position. Repeat for the desired number of repetitions.