My shoulder problems have been around for a while but I'm only just starting to get serious about recuperation and prevention of further injury. The worst thing for it of late was my initial poor form with speed benching. I was just throwing the bar around and doing all sorts of damage to my shoulder. Having since watched a few vids on how to speed bench properly I'm now doing much better and most discomfort is brief when I do have it. I'm hoping to see a physio about it one of these days to get a conclusive diagnosis to work with. I do understand what you're getting at but I pretty sure its not contributing to my shoulder problems. I've been doing high volume stuff for years but its only really been benching and MPs that have caused me pain.