Some embodiments include a knee therapy system that includes a flexible garment or wrap that is electrically conductive, and a range-of-motion sensor coupled or integrated with the flexible garment or wrap. The sensor is coupled or integrated with the flexible garment or wrap, and includes a plurality of electrodes including an active electrode and a receiving electrode. The electrodes can be in physical contact with skin of a patient forming an electrical circuit with control electronics of the controller. The electrical circuit measures an electrical parameter using the active and receiving electrodes, and forms a closed loop electrical muscle stimulation system, where stimulation current or voltage is applied by the electrodes onto the skin between the active and receiving electrodes based on a program and an electrical parameter measured through the electrodes. An optical sensor or camera can be configured to track body joints of a user.
