Nov 23, 2009 11:03 AM:
I would do the Hyper extension on the ground but have found that doing it on the ball gives me the burn on the ab muscles faster that on the ground
I would do the Hyper extension on the ground but have found that doing it on the ball gives me the burn on the ab muscles faster that on the ground-See Less
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Nov 23, 2009 11:03 AM: I would do the Hyper extension on the ground but have found that doing it on the ball gives me the burn on the ab muscles faster that on the ground