Take care to perform the Reverse Windmill slowly. Begin by placing one hand on your shoulder, arm relaxed, elbow towards the ground (Figure A). Slowly raise the elbow forward so the arm becomes perpendicular to your body (Figure B). Continue bringing the arm straight up, keeping your biceps as near to your face as possible. Slowly rotate the arm back with the elbow as close to your body as possible (see Figure C), aware it must travel outwards at some point.