I'm not arguing and I'm not sure how
@Antti meant it, but can't one build their training capacity in different aspects?
That is, you can build work capacity, loosely stated as "volume," AND/OR you can also build the capacity to withstand/manage greater loads. PTTP would be an example of the latter; you never increase the volume, just the load.
Sure, I get that. Maybe I'm mistaken but the way
@Antti worded it: "before we jump into the deep end of the pool," made it seem like he was referring to beginner-intermediate lifters. Wouldn't the "deep end" be the advanced stuff?
Semantics, I guess.
In this context, I was mainly talking about overall volume of all kinds of exercise.
It seems some times I see posts where someone says " I just started PTTP, rucking and Norwegian Kung Pow. I do all five times for two hours each a week. I'm really tired, my lifts go down, I can only ruck downhill and my marital arts performance has made me sleep on the couch. Training history? None, really."
Taken we are originally stable, we should add more stress in manageable doses. Build up our capacity so we are stable again, before adding more. And after a certain point increasing stress means the recovery may have to increase even more.
When it comes to lifting specifically, sure, there are differences to handling volume and intensity. In a sense they're individual, in a sense universal. However, on the context of strength training, load is key. There is only so strong you can get if you avoid heavy loads. So you have to lift heavy if you want to get really strong. Of course, muscles move the load, so it makes sense to develop hypertrophy to be able to lift more. However, in most short term studies I've seen, hypertrophy development doesn't seem to correlate with strength development that well, or at least when compared to pure strength training. Then again, strength sports have weight classes. Last, to an unquantifiable extent it seems that force can take place of the load when it comes to strength training.
So, when we look at overall lifting planning, heavy loads should take preference, but not in volume. Just a little bit carries far. Then add some repeated/submaximal effort for hypertrophy and some DE/CAT/force training. Switch priorities in blocks, but never leave one off the table altogether. The heavy load training volume may not increase that much during our training years, or it is relatively so little, for example 5%, that it doesn't make that big of a dent when we evaluate the overall volume.