I want to gain approx. 10-15 lbs of muscle and I am not sure what body parts to focus on for KICKBOXING. I was also interested in learning submission wrestling later. Should I try to gain on my shoulders + arms primarily? The main focus of this post is for core development. I'd like to gain mass on my core. Will a bigger core help me? (EX. Chuck Liddell's gut) I don't want to be v-shaped unless that is the best way to go. I don't care what I will look like.