Pilates Wall Exercise The pilates single leg circle exercise challenges the abs to work hard to keep the shoulders and pelvis stable, so that the leg moves independently from the rest of the body. In this variation I used the Wall for the exercise to help with alignment and posture. Full Length Pilates Classes on YouTube • Pilates On Demand #pelvicstability #hipstabilityexercise #wallexersice #wallworkouts #wallpilates #pilateswall #singlelegcircle #onelegcircle #masterpilatesinstructor #pilate