HOW: Start on your hands in knees. Your hands should be under your shoulders with your palms down. Your knees should be under your hips. Keep your elbows locked, and rotate your shoulder blades down, up, forward, and back down. Do this in a slow circular motion.
FEEL: You should feel a stretch in your shoulder blade muscles.
COMPENSATION: Don't arch your back. Keep your elbows locked out.
