Ryan here. Think my shoulders need to rest. My left one, anyway. I was doing lat pulldowns reverse grip, usually do 140 lbs 12 times so I figured I'd do 160 lbs.. did 9, 8, and I think 8 the 3rd set. Then I rested for a bit while talking to the older guy in the gym and my left arm started to feel weird. I know I hurt my shoulder once before when doing lat pulldowns so I'm guessing that's what it's from. It could also be from doing shoulder press with the free weight machine. Who knows. Doesn't hurt but feels weaker than it should. Gotta take it easy for a while to let it heal. I'm always getting hurt, doesn't make sense. I'm working out so I don't get injured.