A device and methods for performing a closed-chain exercise for the lower extremities of a human subject and, in particular, the legs, using stimulation. Each of the three integrated circuit tiles is part of an integrated circuit. In subsequent wireline runs, a pack-off and upper tubing stop are installed above the stator, which results in the stator assembly being set by tubing stops on top and bottom and results in the conduit above the PCP being isolated from the wellbore below. The low cross sectional area also minimizes the cyclical vertical forces induced by waves.