Movement: Stand tall. Now rotate your arms in circles - moving your arms behind you, around and then overhead until they are back in front of you. Perform the prescribed number of repetitions, then reverse directions so your arms move up and overhead at the start. Perform the same number of repetitions.
Emphasis: Do not exceed the limits of well controlled mobility. The goal is not to achieve extreme ranges of motion in front or behind you, but to prepare your muscles and joints for more activity.