Known as hypertrophy training, this approach is excellent at breaking your muscles - but you have to remain aware of your body's ability to adapt. Fail to vary the stimulus and you'll soon find that your muscles aren't troubled by the workout. To get around this, I personally rotate my training around the traditional 16 set method, German Volume training , Hypertrophy specific training and 5x5 training. I dedicate four to eight weeks on each training phrase, which is enough time to hit my goals without my body adapting to the exercises.
This is the scenario: a guy, say age 21, becomes serious about gaining muscle. He’s 5′ 10″, 7″ wrists, 9″ ankles, average genetics for muscle size-and-proportioned. He’s played sports, but never done more than an occasional resistance workout. Now, he begins a good training-eating-and-resting program. With his genetics, he has the potential for naturally gaining 45 pounds of lean mass if he stays consistent with progressive training/proper eating for a continuous 3 to 4 years.
But, about three months after beginning his training, he starts taking steroids. He does three steroid cycles in the following 18 months, and includes proper post-cycle therapy. That entire time, he’s continuing to consistently train and eat properly. Before the end of two years, he’s gained 45 pounds of lean mass (which with steroids, by the way, is not necessarily typical but neither improbable). At that point, he permanently quits using steroids, but he does continue properly training and eating for another two years. At the end of four years, he carries the same 45 pounds of lean mass.