... abdominal core system. Sit & Get Fit with the new Rock Fit -- the breakthrough abdominal core system. Featuring exercises inspired ... sexy, ab-shaping moves found in dance, you can rock, tilt, and rotate your abs firm and shapely ... all at the same time.The secret is in Rock Fit's multi-plane seat. This ingeniously designed, fully ... infinity movement that is simple, fun, and effective. Rock Fit (TVF2155)