Abstract: A mechanical device for exercising selected muscle/skeletal groups in the shoulder region of a user. The device includes a round frame with a support member for stability. A pivot ball is mounted on the underside of the support member at the center of the round frame. Handles are mounted on the upper surface of the support member. A user grasps the handles and then rotates/nutates the device about the pivot ball to exercise the shoulder region and related muscles. Three separate handle assemblies may be used to isolate different muscle/skeletal groups of a user and/or vary the difficulty of the exercise: a standard handle assembly, an isolator assembly, and an angled handle assembly.