First off understand I come from a PowerBodybuilding mentality… For myself unless ones trying to actually peak for a meet I tend to lean that way. Regarding addressing hypertrophy using the main lifts I am a big fan of adding one or two back off sets after the completions of the heavy work to add in slightly more work volume at a lower intensity
…. Excluding the deadlift which I won’t go into at the moment.
After which. Much like @MarkKO I will throw in some assessor stuff to address a few other issues to bring up certain lagging body parts. For the record I just have never been into using supplemental lifts to address issues. I tend to stick with the core lifts and address the muscle groups that might be the issue plain and simple
Sure it will if they are peaking for a meet and not adjusting the extra volume in their routine while they are upping the intensity on the competitive lifts. From what I have seen over the years some guys get so gung ho about getting their 1 RM up in a hurry that they are constantly doing programming year round that resembles a in season program . With the notion of an actual offseason is a foreign concept or even sacrilegious. They will tend to keep the reps low... Won’t venture away from a specific rep range which can cause stagnation physically and mentally IMO. Much like when you see a guy wanting to add slabs of beef to his frame but won’t eat enough to support recover or hypertrophy because of some fear that they will lose their 6 pack.
As @dt79 point out
which is true…
Lets take some younger guy 16 or older whose never been super active. Let’s say he has average or slightly below average amount of muscle on his frame based on his activity level. Let’s say this individual comes to me and says he wants to do a powerlifting meet a year from today.
Me personally I’m going to focus on only a few things regarding him.
1. Being obviously I’m going to teach form on the three lifts
2. Putting some lean mass onto his frame by any means that fits
3. Get him overall stronger using a variety of rep ranges and specific secondary movements.
Being point plank my hypothetical guy would spend the majority of the year focusing on the three points I listed. Basically, developing a base from which he can draw on as priorities shift towards an actual meet. Depending how he responded to his lifting I would have him start specializing on the three mains lifts around 12 weeks out or so adjusting volume on the secondary exercises accordingly.
Let’s be honest an individual can get damn strong by addressing technique and seeing an improvement in neuromuscular recruitment. But sooner or later at some point an individual is going to have to address building a bigger engine.