try switching to dumbells.......most teen players will use a barbell but i usually dont and it still pays off....use it in a combination...for example....full squat with dumbells touching sides of feet then as you raise out of the squat do a shoulder press.......youll see your whole body along with your core get alot stronger.........by doing this your not locking your shoulders and arms out by resting them on the bar.........full body movement basically