Exercise description: This is a great exercise for the hamstrings, glutes and your core strength. This is a challenging exercise as the ball is unstable.

Exercise instruction:

1.Lay on the back, place your heels and calves on the ball and place your arms out at 90*.
2.Rise your hips off the ground squeezing your glutes as you come up. Once your hips form a straight line with your shoulders and feet, bend your knees rolling the ball towards you. Keep driving your hips up as you bend your knees.
3.Reverse these steps on the way down, touching your hips on the ground each time.
4.Maintain breathing through out.