You’ll have to experiment a little bit. I like to do something in the beginning of every work-out to “un-slump” my shoulders. (scare cross, rear delt raises, Cuban presses). Low weight, short range of motion, controlled moves to get everything feeling good.
Other guys are ready to come in and get right to work on the big stuff.
-It’s good that you are looking forward to getting some work in! I know it’s supposed to be 100% SERIOUS TRAINING, but its fun to get in there, listen to some hype music and get sweaty.