teenage boys!

[lollipop69]

My son is 14 years old and is very fit and healthy. He trains as a boxer 3 times a week and also trains in the gym 3 times a week. He is fairly muscular however is now worried as one of his pecs in his chest is developing alot faster than the other. This is quite noticable. Is this normal?? Please help as I need to stop him worrying.

I don't think many people are completely symmetrical TBH so most likely he is normal. Does he maybe use one side of body more than other? Perhaps without even realising it. Like right handed people do more things with their right hand.