My brother was already fit when he joined but after boot camp, he was even more ripped. Though he wasn't as young as say the 18-20 year olds in but he still put them to shame. And he's also joined to the Marines so he had to go through that too but since he's down south for the weekend I have some free time where we're not noming on food or playing video games like old times. XD I'm sure you'll do well when you serve, be careful though, I hear they're making a lot of cutbacks all around, they're not letting people reenlist and they're also making it tougher on certain sections so people will drop out since they can't afford to have extra "fat" but my brother is also going to school while in the service which is the biggest reason he joined and he's happy with it, even if it's work and they can sort of screw you with paperwork not getting to the right people in a timely manner but hey, that's the Government for you.