The present teachings provide for an exercise device for exercising a joint and a limb. The device includes an actuator, a foot plate, a foot plate load cell, and a restrictor. The actuation member is rotatable about a rotation axis. The actuation member includes a first portion and a second portion that is movable in a direction perpendicular to the rotation axis. The foot plate is at a distal end of the second portion of the actuation member. The foot plate load cell is mounted to the foot plate and is configured to measure force exerted on the foot plate. The restrictor is configured to restrict movement of the second portion of the actuation member and the foot plate at the distal end thereof in the direction perpendicular to the rotation axis unless force exerted on the foot plate exceeds a predetermined force.
