Abstract: An apparatus usable in physical rehabilitation, exercising and conditioning of normal or injured arms, shoulders and upper body. The user grasps a handle (64) or a knob (66) and rotates an arm (52) against an adjustable, preset level of resistance over a field or range which is expandable to 360-degrees. The handle (64) is affixed to a rotation apparatus (52, 42, 24, 12, 10) which is universally adjustable in elevation, tilt-angles, swivel-motion, handle-extension and tension which can be applied simultaneously with 360-degrees of rotation. The apparatus makes possible the simulating and duplicating of a range of motion, congruent to the total, natural range of human motion of the arms, shoulders and upper body, so as to establish a more natural, effective and efficient means of exercise and rehabilitation.