Set up with your head, neck, and back completely in contact with a ball, and do the incline fly as described above. Or set up on a ball with your feet anchored by heavy dumbbells and your head lower than your hips. Then do the standard fly.
Set up with your head, neck, and back completely in contact with a ball, and do the incline fly as described above. Or set up on a ball with your feet anchored by heavy dumbbells and your head lower than your hips. Then do the standard fly.