Thanks for the kind words.
Singles training can lead to hypertrophy. Any low rep training can cause significant hypertrophy if you do enough sets of it and eat a caloric surplus. How much you grow from it is probably entirely up to your body as everyone responds differently. If low rep training doesn't cause much hypertrophy then how do explain heavyweight and higher weight class powerlifters and weightlifters size? The key is overall volume of reps and frequency along with plenty of rest and FOOD.
But, no, my singles squatting is not geared towards size. It's mainly for overall power and strength. I just happen to grow off it too.
When I say I don't train to failure, it's not as if I don't train hard and not that you're implying that either. I stop my sets at the last rep I can complete. Why bother straining on the rep after which you don't get and that hasn't "SCIENTIFICALLY" been proven to stimulate additional growth. All you are doing is straining for nothing imo. The last rep I can complete is a hard rep anyway and requires a certain amount of "strain". I have done every set to failure of every exercise as well as just 1 set to failure on an exercise since I was 14. About 5 years total training time over the course of the last 10 years with 2 years being my longest stretch of steady lifting. During those years I trained to failure ALOT. I DO NOT respond well to it. I get stronger sure, but it really taxes my system too much and eventually I require greater and greater lengths of time between workouts to the point that it becomes ridiculous. I have trained a bodypart every day, every other day, every 3rd or 4th day, whatever. Once a week works best for me generally. I do multiple sets.
Look at a typical training schedule not including warmup sets for chest:
bench 3x10
incline 3x10
flye 3x10
That's 90 total reps.
My chest workout right now:
bench 10x3
DB bench 1x10
Incline 1x10
Flye 1x10
60 total reps. MY volume is still lower than your average Joe's generic chest workout, but there is still a certain amount of volume as you can see.
I believe you need a certain amount of TOTAL REP volume if you want good hypertrophy from low rep training.
I you do 3x3 for an exercise then probably don't expect much hypertrophy, but expect decent strength gains.
So ya, I believe there is a certain amount of total rep volume needed for hypertrophy.
I can train a muscle more than once a week if I setup my routines around it. It's more a matter of how many days a week and how hard I push my training that dictates how often I can train a bodypart.
For example, I have been training on a 4 day split training chest/back/rest/shoulder-arms/legs. Each bodypart geting hit once per week.
But, I am switching to 3 days a week for awhile to hit certain bodyparts more than once a week.