Are you thinking BFR increases that factor, but never 'finishes' with donation and myo-fibrilliar increases?
I think, and it's a subtle difference, muscles add fibrils in response to the deficit (threat to survival) that was induced 'per fiber/MU' from what was just 'done', they add more fibrils so 'if' you repeated that, they would take some of the work and the deficit would be less the next time (less survival threat). I don't think they grow to make us stronger so we can do 'more' but so if we do that again, it won't 'weaken' us as much. Did that make sense?
Muscles grow to make us stronger in order that we are weakened less by given stressor
Yeah, and I think Lyle did a great review on it here:
https://bodyrecomposition.com/resea...nces-muscle-hypertrophy-research-review.html/