This can drive a competitive bodybuilder to become obsessive after a competition as well, when it is time to grow. Muscle gaining is really different from losing weight. The most important aspect of your muscle building goals is your calorie intake, meaning the total calories you eat in a day. If you don't use a protein supplement, make a point to eat lots of high protein foods if you don't (cottage cheese, chicken etc). Intense stereotypes surround people who are serious about body building.