The human kind is a diverse race. None of us is similar to others. Even when we look at each other?s bodies, we can find a large number of differences. Whenever people start training, there are three specific muscle groups that they are more inclined in beefing up. These are the biceps, the abdomen, and the chest. For those who are very skinny, muscle building usually implies building up a good chest, which they can flaunt. If you are really good at muscle building, then you will be surprised to know that people will first notice the change in your chest muscles, even before they can see the increase in size of your biceps.