Much like was discussed in Fat Loss 101, building muscle is basically a hormonal event. Hormones such as testosterone, insulin, growth hormone and cortisol are giving the body signals on whether to build muscle, or break it down. While exercise is necessary to create a stimulus for certain hormones to be activated, it is also just a small part of the equation. This is why you will see so many people putting in hard effort at the gym day after day, and never really getting any results. So throw away all those books, stop spending $400/month on supplements, cancel your magazine subscription to Muscle Weekly (or one of the other 75+ fitness magazines out there), and master the basics. This is where you get 90%+ of your results from.