Progressive resistant training is great for beginners to intermediate trainees. However, PRT had a built in flaw and limitation. And that is that there is going to be a cap on your strength level at some point. There is no avoiding it. People preach to beginners to try to add 5lbs on their bench press for the same number of reps each month. In theory this works, however 5lbs a month adds up to 60lbs a year and if you continue in that reasoning you will have added 300 lbs to your bench for the same number of reps. As we all know this is impossible.
So you are then (as an advanced trainer) faced with how to continue to stimulate this muscle and entice growth out of it in light of not being able to apply the progressive overload theory.
Personally, I choose volume training. I could resort to tactics like forced reps (which I never do), negatives, etc.. but instead going to extreme actions like that (and putting tendons, ligaments, and the muscles themselves at unnecessary risk) I just instead do an extra set or two. Besides, when fully pumped up with blood you don't really want to stop. Like Arnold compared it to cumming. You can't get that muscle bursting pump by using low reps all the time which are designed for strength. You have to pump that blood in there a drop at a time with every rep. This is what leads to muscle growth as the blood volume helps stretch the muscle from inside and thus make it more acceptable to enlargening itself.
Also, you have to forget things in terms of exercises. Your muscles do not know what exercises you are doing, all the muscles know is whether they are contracting fully or not. You would not belive the majority of people that turn something as simple as a bench press into everything it is not suppose to be and throw all stress on the front delts and elbows. Defeating the entire purpose of going to the gym in the first place. You have to lose the notion of things like flyes and cable crossovers being "finishing" or "sculpting" movements and only good for high reps. Based on the basic rules of anatomy, flye movements are more of a pure chest movement that presses because they follow the proper range of movement that nature designed them too.
What it comes down to is it is not what you do, but rather how you do it. While varying the degrees your body is placed at during the movement (incline, flat, decline) you can actually shift the stimulation slightly more to those specific areas. But it really is not how you place your body as the most common notion suggests, but rather it is how the movement is executed. For example, you can lay on a flat bench and do barbell pressed to the throat (which is an excellent exercise) and you will feel that despite laying flat, the upper pecs are the majority workers in this exercise. Such as it is with other exercises if you simply forget preconceived notions of how things are and instead just look at why people think they are like that.
Please Scroll Down to See Forums Below 
