Lie with your middle back resting on the ball and your feet flat on the floor hips width apart.
Cross your arms over your chest.
Engage your core muscles and tighten your buttock muscles to lift your hips up into the bridge position.
Gently move the ball from side to side moving your upper body and transferring your weight from one leg to the other.
To make the exercise harder, walk your feet further away from the ball but only do this if you can maintain good control.
