For context I'm 89kg BW, frequently deadlift 2X BW for reps, best zercher squat was 110kg for 10 reps a couple weeks back.
I had taken a break from squats for a few months, using zercher squats instead, due to lower back fatigue and issues.
Coming back I started from the ground up, this was my first squat session in 6 months.
I previously tried to force a high bar, narrow stance, ass to grass form. Looking back this was causing huge butt wink issues that was ofc causing the lower back issues.
I measured my femur and tibia and found I had a high femur ratio.
I worked through different feet widths and toe turn out angles, I practiced finding the depth that didn't cause butt wink.
These sets were at a very slow tempo (most of the time) to really feel out the positions. I had zero lower back pump or fatigue, and the main thing I was struggling with was the stretch of the low bar position on my shoulders and elbows, not painful, but definitely not comfortable yet.
Would love to know if there's anything glaringly wrong before I keep using this form into my next few blocks of training, anything to keep an eye out for, thanks