In V104, Helms famously established "Volume Landmarks." For natural lifters:
This isn't a "bro split for gear users" book. Helms (a natural pro bodybuilder) writes for people without pharmacological recovery. He explains why a powerlifter’s 90%+ 1RM attempts are poor for muscle growth, and why a bodybuilder’s 20-rep pump sets are inferior for strength. eric helms the muscle and strength pyramid training v104pdf