Did mostly sets of 15 today. Usually the first 12 are heavy but ok, the "fire" doesn't set in until the last 3. Can't help but feel that the first 12 are sort of wasted. However, I'm not willing to give up the creatine supps.
The shoulder didn't twinge at all, tho I got a snap out of it while exploring the right position for a new grip on the cable rows.
While doing the lat pullover machine (it involves starting with your arms almost over your head, elbows forward, and then pulling them down forward to your sides against the weight), a ways into the 2nd set, the muscles just failed. No burn, no pain, no shuddering, just the bar stopped moving. It was very strange. Cut the weight a bit, then slowly started dialing it back up every 5 reps. By the end of the 3rd set, I was back up to that weight.
Added some weight to the lower back work. There is this frame that lets you do a "sit up", up-side-down. When relaxed, the upper body is hanging down, and the pull is to straighten your body out. The pull is entirely in the lower back. Had been doing it "free", this time did it with a 10lb plate held up to my chest. Yow. Burn.
Finished with trap shrugs. Look at the muscle that joins your neck to your shoulder, the one that gets squeezed in a "vulcan nerve pinch". Using that muscle, shrug up your shoulders so your neck disappears. Now, do that 15x3 times, holding a heavy dumbbell in each hand, and hold the squeeze at the top for a second. It sets the whole back on fire, down the sides of your spine, 3/4 of the way down your back. The trap is attached in a LOT of places.
I'm not addicted to the burn, unlike hardcore gym rats, but I've really learned to distinguish it from "pain". What's funny is that medical science still doesn't know what the burn actually is!