Set-up: Stand tall with a tight core, a slight bend in the knees and a neutral back.
Movement: Extend your arms straight out in front of you and parallel to the floor. Allow the sides of your hands to touch. Retracting your shoulder blades and focusing on your back and shoulder musculature, pull your arms back to your body so that your forearms are perpendicular to your upper arms and your upper arms are perpendicular to your back. Return to the start position along the same path.
Emphasis: Do not push your head or torso forward to meet your hands - your back, neck and head should remain in the same relative positions throughout the movement.