Hey Izzy, when I was younger I was like you, then I started martial arts and quickly gained weight and size.
If you focus on the resistance training you might be able to bulk up fairly quickly.
I should add that the type of martial arts I do is jiu-jitsu, so I did a lot of grappling as opposed to sparring.
Edited by Hookpunch (04/25/08 02:18 PM)