Verified answer

You cannot spot reduce. You lose fat universally, and cannot pick where you want it go to away. You are still rather young, so just excercise and hit the weights. Your body is still growing, so i wouldn't worry too much about it.

Running will change your body shape like nothing else, I promise you that. Running burns around 100 calories per mile. It also improves core strength and tones your legs, adn your whole body

Well, one simple answer is toning your tummy. there are lots of tummy exercise that you can do to tone your stomach. That will give you shape and some abs, that is if you want them.

stop worrying you are only 13 and your still growing.