A mobility aid includes two side frames, each configured for contact with a hand or forearm of associated user; an interconnecting frame member; two or more wheels; one or two adjustable torso bars attached to side frames, and each variably including a posterior member for maintaining consistent contact of torso with the anterior member. Flexed posturing and abnormal lower body biomechanics are common with use of wheeled walking aids managed by the upper body. Users typically excessively push down and forward to advance device. The novel body engaging member(s) enable the presented device to be advanced by torso contact as the user walks. Upper body weight bearing is thereby minimized. Propulsion is enhanced as user advances the pelvis against the torso bar(s). Posture is improved and safety is increased. A walker is provided for users requiring, or training to achieve, light upper body support.