NOVELTY - The system (10) has a platform assembly with an elongated upright support comprising a longitudinal axis and an upper end, a middle portion and a lower end, which is configured for stable contact with a supporting surface. A step is adjustably connected to the upright support and is selectively adjusted upward or downward along a longitudinal axis of the upright support. A left armrest is connected to a right armrest by a console connection member to form an armrest assembly that is connected to the upper end of the upright support.    USE - Orthopedic exercise therapy system for rehabilitation of a post-operative joint of a patient, by a therapist or physician.    ADVANTAGE - The system is designed such that the device provides immediate biofeedback to a patient and recordation of the therapy progress. The system is convenient and safe to use under the manual control of the patient such that the patient realizes maximum benefit from the therapy in a controlled, measured manner with the benefit of immediate biofeedback on the degree of extension and flexion of the affected joint without the need of professional assistance. The system is ergonomically configured to provide a stable platform to maximize biomechanical leverage for exercise therapy that is controlled and adjusted by the patient using information provided by the immediate biofeedback of degree of joint extension and flexion achieved.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a method for providing joint exercise therapy for a patient    (2) a kit comprising an exercise therapy system.    DESCRIPTION OF DRAWING(S) - The drawing shows an isometric view of a therapy system including an ergonomically adjustable device frame for supporting a patient during the exercise regime, biofeedback assembly and the data recordation assembly.    Orthopedic exercise therapy system (10)    Adjustable forearm rests (16)    Biofeedback assembly (20)    Data transmission device (30)    Power input (32)    Left side assembly (56)    Right side assembly (58)