i've got a bit of a shoulder injury my self, just recently i've gotten to the point of stopping 1" above my chest instead of tri's parallel. i've widened out my grip a bit as asoon suggested, which shortened up the movement, and removed the arch. its helped quite a bit and i'm able to move big weight with minimal pain. just be careful and if its giving you a ton of grief, if you have insurance see a dr to make sure its cool to lift. dont wanna make it worse