More defense with the feet (position), less with the hands will get a lot less whistles. Basketball fundamentals: You must not just "reach-in" and take a swipe at the ball as the player dribbles by you (usually a foul)...instead you must move your feet, hustle and stay with your man, and prevent him/her from getting to the basket by getting yourself into proper position. Also, when you "reach-in", you lose your defensive stance and balance and are now easy for the offensive player to get around.