I believe your shoulders should be back. However there should be no piching sensation. If you stand straight and relaxed your arms will hang at your side. If you bend at the waist and begin to assume your golf posture and relax your shoulders, your shoulders will "round". Now if you keep your shoulders relaxed and round and stand back up you will notice that your arms and hands are no longer at your side but in front of your body. This causes seperation of the arms from...