When you start out with BBing, you wind up with HIT pretty fast because it gets fairly obvious that nobody has a clue what they are doing and HIT makes sense. All that said if you work your way to any of these people - who are never featured or mentioned in the BBing magazines: Medvedyev, Zatsiorsky, Siff, Laputin, Roman, Verkhoshansky - you get some far far better insight into effective training stimulus. I watched BBing go from 3 day on 1 off splits with people doing AM/PM work in the late 1980s to 3 days a week doing a bodypart once per week by the mid-to-late 1990s - all from not having a clue as to why they came back stronger after a layoff and thinking they were overtrained. This runs headlong into a detraining effect but regardless, they never once even hypothesized that there was an independent fatigue component at work - something that was very well known and very well documented and studied years before and in use worldwide by that point. This wasn't advanced - this was training 101.
A lot of people on here quote Arnold's Encyclopedia which amounts to a rough roll of toilet paper. Very very few people have ever heard of any of these books yet they are generally and fairly widely accepted to be some of the best ever written on the subject of training. Coming from a BBing perspective it's hard to fathom that all this is out there in maintstream use and you never ever run accross it. Then again, this is the whole thing I'm trying to fix.
www.elitefts.com - Go to the books on training. You'll find the following (in no particular order):
A System of Multi Year Training in Weightlifting
Fundmentals of Special Strength Training in Sport
Supertraining (plus lots of others by Siff)
Managing the Training of Weightlifters
Science and Practice of Strength Training