Major muscle groups involved: Abdominals, anterior neck
Execution:
From a seated position on the ball, walk forward and recline until your torso is parallel to the ground. The basic movement, spinal flexion, is done by pulling the base of your rib cage toward the hips. Your position on the ball and your arm position determine the level of difficulty. The farther back on the ball you are, the more difficult it becomes. Raising your arms to a higher position in relation to your body increases the amount of resistance and the level of difficulty.
Basic Stability Ball Crunch Video
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