When I trained at home the only squats I did were zercher squats. I didnt have a squat rack so I had to deadlift the bar up to my knees, rest it on my thighs and sit back, then hook my elbows under it and begin squatting lol. It was the only way I could get enough weight loaded onto me to really tax my legs haha.
My upper back doesnt round though, my lower-mid back looses the arch and on the 3rd rep of 330 I felt it start to round. That is why Ive started doing the weighted hypers again. They seem to work great on my whole posterior chain. When I pull I purposefully dont retract my scapula... they stay quite seperated. This is because my traps and upper back are pretty strong and once the bar comes to knee height I can pull my shoulders down and back which pulls my scapula back together and really helped power the bar through the lockout. It sounds complicated but it feels very natural and I bet alot of people do it without realising. Ill have to video it some time.
The 3rd rep of 330 yesterday the mid point was very hard and especially from the bottom of my knee upwards I could feel my upper back pulling hard to keep the weight moving. For the last few months Ive been hitting 1 or 2 sets of shrugs after deadlifts usually just as Im unloading and putting away the plates from the bar. It has really helped my upper back strength.
But as I said, I dont like always pulling so heavy that my form breaks down, that is how I got injured before, and since Ive been thinking about working some deficit pulls in Im going to drop the weight back down and start pulling from the smaller plates again.
Ive only been eating 150g of carbs per day, and thats on a workout day where I eat more and have a chunk of post workout carbs. On rest days its more like 125g. All year Ive been trying to get by without eating alot of carbs, Ive been using high protein/high fat/low-moderate carbs and the progress has been very slow, but steady. Ive gained about 5lbs of quality gains since the beginning of the year, but that is still pretty crappy even if it is lean gains. I have put around 50lbs on my squat though. So it seems to work ok for strength gains without size/bodyweight increases.
But Ive come up with some new diet changes and Ill be adding more carbs for the most part. 190-200g per day seems to be the tipping point which gives pretty good weekly gains so Ill be starting with that. Protein will still be at 60-65g per meal and Ill drop fats accordingly.