Abstract: A mono-kinetic exercise device for mounting within a doorway or other rectangular aperture. The exercise device includes brackets of various types for attachment of the device to the door frame, tensioning devices, one or more ropes extending lengthwise along the device and a gripping bar grasped by the person desiring exercise which may be moved upward or downward within the doorway such that the movement entails an effort by the exerciser and provides muscle exertion. The gripping bar is moved against frictional resistance that is developed in the interior of the gripping bar.