06/26:
ahhh, finally a good workout. while cleaning up my room I dug up a weight lifting belt I had bought a couple months ago and totally forgot about. given the back issues I'd had, I gave it a shot for the two heavier sets of squats today and it made a HUGE difference.
back squat: 135x5, 175x5, 205x5, 225x5 (belt), 245x5 (belt)
bench: 135x5, 185x5, 225x5, 255x5, 285x3, 225x8
hang power clean & push press: 95x5, 115x3, 135x3, 155x3, 165x2 (missed 3rd rep)
weighted dips: BWx8, 30x8, 50x8
Bar speed was very good for squats today. 225 felt light... 245 didn't feel too heavy, went a bit slower, but I got all 5 up pretty well. The belt let me stop panicking about hurting my back and just focus on form, and I'm amazed how much of a difference that made. My back felt 100% the entire time, so I think I'll stick with this strategy: first 3 sets are normal, last 2 heavy sets are with a belt. I'm going to start alternating front squats and back squats in my workout, so Saturday will be my first front squats in a while. I probably won't need the belt for them, but I will use it for deadlifts afterwords. The Tuesday after that, with a couple days rest, I'll do back squats again and hopefully put up 265. If I do, I'll finally feel a bit more like my old self and be more confident that I'll be back at the old weights in a few weeks.
Bench went extremely well: all the sets were pretty easy and I definitely had more in me. Power cleans felt *fantastic*. Explosive weight lifting movements are so refreshingly different than other lifts and really get me pumped. The weight I put up is still pretty pathetic, but I'm very new to the exercise (have only done it ~4 times so far) and I'm gradually developing my form. I'll have the occasional rep where I'll get the form perfectly and send the weight flying, almost hitting myself in the face... and then i'll have a rep where it barely clears my stomach - such as the last rep of the last set, where I was absolutely gassed. Practice, practice, practice. Finally, dips were problem free as well.
It's amazing just how different I felt after today's workout than the previous two. Nothing hurt, I felt strong, and I even had a bit of a "runner's high" type feeling. Let's hope I have more good workouts coming in the future.
edit --> also, forgot to mention that as part of my warmups, I did a couple sets of overhead squats. One with the bare bar and one with 85lbs, each for 8 reps. The bare bar finally felt very solid and balanced, but I was still quite wabbly with the 85lbs. I'll keep at it.