Abstract: A low stress therapeutic device is provided by utilizing foot plates and guide rails having operationally tracking surfaces of a low coefficient of friction supported by a platform. The device includes a rail stabilizer equipped with extending longitudinally recess or slot and a slideably mounted foot plate having upon its underside a longitudinal projection slideably retained within the rail recess. The therapeutic device may be designed to operate under relatively effortless strain at a low coefficient of friction. The therapeutic device is useful for knee replacement, stroke victims, ACL repair, and other therapeutic treatments requiring a nominal initiating effort of movement for rehabilitation. The device may be provided as a one or two footed device of a light weight particularly useful in a patient sitting or lying position. The foot plates may be appropriately equipped with longitudinally underside tracking guides reciprocating sliding within longitudinal slots provided by a tracking rail.