Stand up straight with your affected arm bent in across your body.
Your wrist should be neutral with your palm facing up towards your face.
Circle your forearm away from your body, turning you palm to face the side of you head as your forearm reaches the vertical position.
Continue the circle, starting to turn your palm to face forwards, then extend your wrist as your forearm reaches the horizontal position turned out from your body.
As you continue the circle, relax your wrist as your forearm points down towards the floor, and return to the starting position.