What do you mean by "Destroyed body" in your question?
You are young! So with a little exercise, water, and a good scrub brush, you shouldn't have any problems with stretched skin.
I mean, for women, when we have babies, our skin grows back to normal. Men usually heal better than women. If you are worried about stretch marks, simple. Use a cream with high amounts of Vitamin E. It fades them... works great on scars too.