To perform the DB Shoulder Press On Ball, begin by sitting on top of the ball with your feet firmly on the ground. Keep your abs tight and hold dumbbells to the side of your head, with your palms facing away from your body. Your elbows should be held at 90 degrees. As you exhale, raise the dumbbells slightly in front of your head and above your head until you touch the ends of each dumbbell together. Your arms should be as straight as possible and you should not lock your elbows. As you inhale, bring your arms and the dumbbells back down to the starting position.