There are lots of people do do the classic "leg day" or "arm day" approach, and perform many types of workouts & many sets, spending at least 30 minutes on one muscle. I haven been going at it by doing much less volume, but high intensity. For example, Start out with Benching 3 sets of 10, then move on to rowing 3 sets of 10, then bicep curls 3 sets of 10, then tricep extension 3x10, and the last set of all these workouts would be a dropset. I read somewhere that bulking is all about intensity, and not so much about volume. Short burst of high overload on the muscle will stimulate growth, sometimes even 2 sets would be enough if the intensity is high, and them muscles are worked out to total failure. So Is high volume really needed or no?