Targeting key muscles with this move helps to strengthen your back while improving your posture. Lay your belly on a ball and find stability by spreading your legs wide and planting your toes on the floor. Bring your arms in front of your ball,
Sculpt the back of your shoulders. pull your navel in, squeeze your glutes, weight in one hand (A). Lift arm to side (B) by activating your shoulder muscle. Don't use momentum. Hold at top for Lower. Repeat 10 times and switch.