Abstract: A computerized exercise, physical therapy, or rehabilitation apparatus with improved features. The computerized exercise apparatus permits concentric and eccentric isokinetic exercise by a user where apparatus calibration is accurately determined before exercise to compensate for the user selected force application device, the push assembly, if used, and environmental factors; where hydraulic flow can be accurately controlled by use of an alternating current dither circuit; where multiple user force application devices, a push assembly, and a detachably connectable operator support are available for a myriad of exercises; and where the instantaneous forces measured during user exercise are displayed to the user in such a novel way so as to motivate the user to maximize their exercise efforts and thereby obtain increased personal benefit.

Abstract: The present invention relates to a user force application device which will optimally be used with a computerized exercise, physical therapy, or rehabilitation apparatus, preferably, an apparatus which permits concentric and eccentric isokinetic exercise by a user. One embodiment of the user force application device comprises a main support structure; securing assembly for securing the main support structure in an exercise position desired by a user; a shaft having a cable end and a handle end, the shaft being received by the main support structure and moveable therein, the cable end and the handle end extending from the main support structure; controlling assembly for controlling movement of the shaft within the main support structure; a handle detachably connected to shaft handle end; and detachably connecting assembly for detachably connecting the shaft cable end to the tension transmitting device of an exercise apparatus.

Abstract: The present invention relates to a user force application device which will optimally be used with a computerized exercise, physical therapy, or rehabilitation apparatus, preferably, an apparatus which permits concentric and eccentric isokinetic exercise by a user. One embodiment of the user force application device comprises a hollow outer cylinder, an inner cylinder inserted into the hollow outer cylinder and in co-axial alignment therewith, the inner cylinder being freely rotatable around its axis and freely slidable within the hollow outer cylinder along its axis. Grips of different size and shape can be provided which can easily be attached to the inner cylinder. The movement of the inner cylinder inside the hollow outer cylinder can be restricted. By attaching a larger cylinder to the inner cylinder and in co-axial alignment with it, rotational resistance can be provided. The user force application device can be secured to the exercise, physical therapy, or rehabilitation apparatus.

Abstract: A computerized exercise, physical therapy, or rehabilitation apparatus with improved features. The computerized exercise apparatus permits concentric and eccentric isokinetic exercise by a user where apparatus calibration is accurately determined before exercise to compensate for the user selected force application device, the push assembly, if used, and environmental factors; where hydraulic flow can be accurately controlled by use of an alternating current dither circuit; where multiple user force application devices, a push assembly, and a detachably connectable operator support are available for a myriad of exercises; and where the instantaneous forces measured during user exercise are displayed to the user in such a novel way so as to motivate the user to maximize their exercise efforts and thereby obtain increased personal benefit.