Thanks for the reply. This certainly clears up a lot of confusion!
I didn't realize that twice per day training could produce superior results using similar set counts of 15-20 sets/day. Is this because one is stimulating protein synthesis via training twice in the same day vs only once? (This question is still bearing in mind that set volume is individualize based on the trainee)
Also, when you say this should be a small part of the annual plan for a trainee, how much of an advanced trainee's year would you say is appropriate and not risky for overtraining?