Today I switched things up a bit. The past couple months I haven't done anything less than 6 reps, and today I was doing 5x3. Apparently I had no idea what weight I needed to be using. My priority has been getting stronger, but also improving my muscular endurance by doing 6-10 reps with short rest periods and putting big excercises together, meaning I deadlift right after I squat. Anyways squatting triples was a lot easier than I expected. 265 wasn't a problem until the last set, which seemed odd since I got pretty worn out by doing 4x6 with 205. I even felt like I could have done a lot more but I had to deadlift right afterwards...which brings me around to my point. I figured I would throw 265 on the deadlifts too and see how that felt and during my first set I felt some pain in my upper back. Rested 60 seconds and during the rest I decided I needed to widen my stance a little so that I could get my butt lower to the ground. That seemed to help a lot but I am having a little pain now. I was wondering if from this info someone might be able to offer some advice. Does upper back pain indicate that I am rounding my back and not getting my butt under me enough? Is widening my stance a little and getting lower the fix? As well obviously as making sure my spine is neutral throughout the movement.