Begin about a foot distance from the wall. Start with your arm straight up overhead with your palm against the wall. With a straight arm, and without rotating your shoulders, begin to draw a big circle against the wall. If you cannot complete a full circle without bending your elbow or rotating, step a little further away from the wall. If you don't feel enough of a challenge, step closer to the wall. Once you've completed all your circles on one said, repeat on other arm. Notice how one side might feel tigheter than the other? That's okay! You can spend more time on your tighter side to give it more attention.