Instructions
Sit on top of swiss ball and walk out with your feet until your lower back is on the ball. Lie back on the ball with your hands by your ears and elbows out wide. Before you begin the movement, brace your abdominal muscles. Flex your waist to raise your upper torso, whilst keeping your elbows out wide and having no movement in your legs. Reverse the movement, then repeat.
Tips
To ensure you have the right size swiss ball, when you sit on top of the ball, with your knees bent and feet flat on the floor, your legs should form approximately a 90 degree angle. To decrease the difficulty of this exercise you can position hips lower on the ball or place your arms across your chest.
