How to perform the exercise
- Lie on your back with legs extended and heels resting on a swiss ball
- Keep your arms flat out to the sides
- Squeeze your glutes and raise your right leg off the ball until it is in line with your left thigh
- Push your hips up to form a straight line with your body
- Pull your left heel towards you and roll the ball as close to your buttocks as possible
- Roll the ball back to starting position, lower your right leg and alternate to the left leg
