Step 1: Stand with your feet shoulder-width apart.
Step 2: Bring your right arm across your upper body at about shoulder level. Your elbow should be slightly flexed.
Step 3: With your left hand, grasp under your right arm just above the elbow.
Step 4: Gently pull your right arm across your chest, toward the left, and hold for 5 seconds. Don't shrug your shoulders – keep them relaxed.
Step 5: Repeat with your left arm across your upper body.