One embodiment is directed to a brace for limiting motion of a joint of an appendage of that is interposed between a first appendage portion and a second appendage portion of a patient, comprising: an upper member removably coupleable to the first appendage portion, the upper member having proximal and distal ends; and a lower member removably coupleable to the second appendage portion, the lower member having proximal and distal ends; wherein the distal end of the upper member and proximal end of the lower member are coupled to form a movable joint that is substantially alignable with the joint of the patient, such that when the patient attempts to move his appendage and associated joint, motion is resisted at this joint in a nonlinear fashion.