Good damn looks like ur smuggling a softball in there lol.Honestly i find as this sounds backwards i know, if i pump a high volume set first, i can hit a heavier set more comfortably and easier because the muscle joints tendons are warmed up and firing properly in my experiencez that is also why i like to do it, all this came about because of my shoulder injury and surgery, after that i started to trian this way and noticed it produced good results, by not pounding my body heavy constantly eveey workout my recovery is better my endurance goes up and i get stronger.
People think pumping 15lbs for biceps is stupid. Until you do it for a while and stixk at that weight for a couple weeks.. then somehow your now doing 25lbs for 15 and repeat the process while bumping weight up a few lbs on the firsr set every few weeks.
If you watch some weeks i purposely drip all weights lower than what i can actually handle and treat it more like an active deload, so instead of time off i can keep working while decreasing stress impact on my body and muscles.
When i had peak biceps i got them from light weights high volume not heavy sets constantly.
Here for reference is a few photos of when my physique was at my peak in my mid 20s when i was still natty, currently im 36 for age right now to show u how i looked at one point.
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Your strategy makes total sense. I kinda train similarly in the sense that I don't go for heavy low reps very often anymore. When I was powerlifting it was almost all I did and I barely grew. Soon as I started bodybuilding I dropped the weight, focused on form and suddenly I started shaping up. For me low reps is like 12 these days.
I like this warm up/semi working set idea tho. It's brilliant. I'll be sure to pass the knowledge along and shout you out when I do