Abstract: An exercising device combining a treadmill with an upper-body suspension device is disclosed. An upright frame is supported from the base of the treadmill. A gantry frame is pivotally attached to the upper end of such upright frame. Pneumatic linear actuators are interconnected between upright and gantry frames to provide rotation of said gantry in relation to said upright frame. An upper-body harness is suspended from the gantry frame. Introduction of regulated air pressure into the pneumatic actuators exerts an upward force on the harness and facilitates walking exercise with less than the full gravitational force on the subjects lower extremities.