Volume has this is called is based on the number of exercises you do, the number of sets, and the amount of rest time in between sets. Time is a very important issue when it comes to volume. Its really all about keeping a good pace during a workout, with a 4-5 minutes between live sets. In all a good workout should take about 1 hour, this includes aerobic exercise also. The article also states what kind of exercises that a person should do.
Many people go into the gym and try to almost kill themselves.
This is where the question of how much intensity should be used in a training program comes in. The author of this article has a clear opinion on this touchy subject. He suggests that a person should train until they may have one last rep in them. This way he feels you will not completely burn out the muscle, ruining the rest of your program. This really is true because the goal of lifting is to lift more each time not to go till failure.