How to perform the exercise
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Lie on your back with legs extended and heels resting on a swiss ball. Keep your arms flat out to the sides.
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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.
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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.