Are you building muscle the wrong way?
I remember when I first started lifting and training with weights. I had absolutely no idea what I was doing. One of my main reasons for lifting was that I was skinny-fat kid who was very weak. You know the guy I'm talking about, he doesn't weigh a lot, but he's just "soft". That was me.
I wanted to be strong and fit; and was also starting to take my martial arts training much more seriously. I knew that lifting weights would help me get stronger and be a better fighter.
When I first joined the gym and started lifting, I tried to mimic what everyone else was doing in the gym: biceps curls and bench press (but of course the WRONG way). Think about how many guys you see doing that everyday. How many of them do you actually want to look like? How many of them actually look like they are strong and muscular?
I had no idea what lifts to do, how to do those lifts properly, how to organize my lifting routine, and how this so-called routine would effect me.