I’m 41 and 4w/kg on ~5 a week (LV + some additional outdoor, or longer workouts or occasionally an additional workout. Just started TR this year, I guess 4.2-4.3 should be doable on this volume/tss (~300).
But, some are more gifted then others, never really saw myself like that, and still not sure, but here’s a good read on the subject:
I’m pretty sure I could get to 5 on high volume, but hv doesn’t fit into my live (or maybe I just don’t want it right now, maybe when I’m sure I hit a plateau on current volume ;))