Sources and further reading

Jeff Nippard’s gains-by-level talk is the source for switching when session PRs slow, then using upper/lower or push/pull/legs, with most sets at 1 to 2 reps in reserve. Intermediate work starts to rotate and specialize. Beginner work does not.

Mike Israetel’s Hypertrophy Made Simple #12 is the source for intermediate work in 5 to 10 and 10 to 20, pushing from about 3 RIR toward 1 or 0 across a block, and for training between minimum effective volume and maximum recoverable volume. True maintenance volume for non-priority muscles belongs later, when one group is being driven at the ceiling. His volume and frequency talk is the source for women often running more lower-body sessions in a week without dropping upper work.

Chad Wesley Smith’s beginner-to-advanced year split and hypertrophy-block design are the sources for giving intermediates more strength work than beginners, still with hypertrophy in the year. Juggernaut Method 2.0 is the wave structure (10s through 3s). The shared textbook is Israetel, Hoffmann, and Smith, Scientific Principles of Strength Training.