An orthopedic device includes a footplate defining opposing first and second sides and an upright support having a distal portion connected to the first side of the footplate. A motion control system controls movement of the second side of the footplate by anchoring at least one tensioning element to the second side of the footplate at a first guide while guiding the at least one tensioning element above the footplate through a second guide on an upper anchor element. The at least one tensioning element is arranged to allow movement of the second side of the footplate in a direction away from the upper anchor element until the at least one tensioning element becomes taut and to slide through the first and second guides when a proximal portion of the upright support moves toward and away from an anterior end of the footplate.