Thin arm posture: 1. King Kong sat down to adjust his breathing. 2. Inhale and hold his left elbow with his right hand behind his head. 3. Inhale and press his left arm for a few seconds. 4. Restore elbows with both hands. 5. Try again on the other side. 6. After the other side is finished, restore your elbows with your hands and keep them for 10 minutes.