The final stage of rehabilitation is to provide an advanced functional gait with or without adaptive aids. A functional gait is determined by a coordinating the clients center of gravity and balance whilst moving. To gain a functional gait, control is needed in all muscles that allow walking to take place, from core stability to full range of movement in hips, knees and ankles as well as reciprocal movement of the upper body. Once control has been established, coordination of the movements needs to take place in order to maintain a smooth gait. Like level (3) posture and biomechanics plays a big part in this level. Therefore continual strengthen and conditioning of all muscle groups will take place.