Stand with your weight on your left leg and right leg held off the floor.
Squat down with the ball on the outside of your left foot. Follow the ball with your gaze, ensuring that your knee travels directly over your foot.
Stretch up and twist your upper body so that the ball moves high up to the right. Follow the movement of the ball with your gaze.
Repeat the exercise. Then do the same movement with your weight on your right leg.
