A multi-position stabilizing and strengthening apparatus for use in exercising different target joints is provided. The apparatus includes: a height-adjustable base and a first assembly including a track mounted to a portion of the base defining a movement pattern. The apparatus also includes a second assembly slidably mounted to the track to permit motion of the second assembly relative to the first assembly according to the movement pattern along the track and a third assembly including a tray sized to receive a portion of a limb and/or joint of a patient. The third assembly is rotatably mounted to the second assembly to permit relative in-plane rotational motion of the third assembly relative to the second assembly. The apparatus also includes a brace assembly fixedly mounted to the tray to receive portions of the patient's joint and/or limb, thereby securing the patient's joint and/or limb to the third assembly.