So I suppose his mindset was something like this: He believed HIT provided the optimal (or minimum effective) dose, and that eventually you top out on muscle mass due to genetics. So he kept using the same workout(s) and the same weights, focusing on getting as much intensity and inroad as possible, and then after the fact noticed he was gaining muscle mass ever so slowly???
I’m speculating about that because someone who was still actively chasing and hoping for gains would rarely be that patient. I think it would be pretty rare among enthusiasts to go 10 years without changing up something, if they were expecting to see visible progress. Given all the things that can change in a year, 1 lb/year of muscle gain would be pretty difficult to detect objectively.
BTW, I recall that Dr. McGuff expressed similar sentiments about weight selection. He said something to the effect that there was a range of weights on a particular machine that worked very well for him for inroading. Too light, and it takes too long, too heavy and form and quality deteriorates.
In effect, in this approach you chase inroad (somewhat of a subjective target) instead of load. Obviously, it must work for some people. I’m just amazed that someone could be that consistent. Once I feel I’m stalling on progression, the temptation to start tweaking is hard to resist, even if the tweaks rarely produce any different results…