This exercise strengthens the spinal and hip extensors, which helps improve posture and tighten the butt! Make sure to maintain an even curve in the spine…more »This exercise strengthens the spinal and hip extensors, which helps improve posture and tighten the butt! Make sure to maintain an even curve in the spine throughout the exercise — and don’t allow the head to move up and down! www.PilatesOnFifth.com« less
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