Exercise ball back extension with arms extended

Place the stability ball on the ground and lie face down on top of it, with your hips resting on the ball and your feet against a wall for stability. Extend your arms straight out in front of you, with your palms facing down. Engage your core and slowly lift your upper body off the ball, keeping your back straight and your neck in line with your spine. Pause for a moment at the top, then slowly lower your upper body back down to the starting position. Repeat for the desired number of repetitions.