I used to have two different leg days, one involved a lot of non-spinal loading work, and the other heavy compression. I figured this would help me get the most of both approaches (compounds and more isolation, targeted movements).
The non-spinal loading day might be:
Single Leg curls
DB RDL’s
Single leg exts
Walking Lunges
Leg Presses
While the day that put pressure on my back might be
RDL’s
Front Squats
Back Squats
Obviously I did much fewer exercises on the later training session, but you can imagine that the stress it put on me was considerable even though it may appear to be the “lesser” workout to non-training folk.
Factors like intensity, rest periods, recovery time (between sets, between sessions, recovery approaches you follow outside of the gym…) can play into how many exercises you should/could handle and be productive from.
S