I'm gaining muscle, but I'm also gaining fat!?
A few months ago I decided to get serious about working out. I even hired a personal trainer who pushes me to the limit. I have definitely become stronger. BUT for every bit of muscle I've gained I've gained fat to go with it. I'm 5'9, used to be about 150 lbs with close to 20% body fat. Now I'm 10 pounds heavier with a bigger chest, biceps, etc -- but still at almost 20% body fat. I don't think diet is a problem. I know what sensible foods are and I eat them in small portions. Does this happen a lot? What can I do?