I've always had pretty skinny arms, until now I realize it's a bad thing lol. I do have some muscle since I started working out and there are some cuts. At first I thought it takes a long time to develop alot of muscle until I realized something else. Merely doing self resistance training for my chest, I have developed a dramatic amount of muscle mass and have pretty friggin nice pecs since I started, and this is only after about 4 sessions. I'm wondering, maybe I should use self resistance for my arms as well? Or what else could I do to buff and cut my arms up?