perhaps this is your answer!
this was copied from this thread:
http://www.anabolicreview.com/vbulle...&threadid=1205
THIS MIGHT HELP ? Have a read anyway! (Post #23)
When you do bench you need to first lay on the bench. Pretend you have a bar in your hand and let your arm fall naturally in a bench position. Now raise your "pretend bar" 5cms(2 inches) higher.
From NAte_dog:
This is the NATURAL RANGE OF MOTION(ROM) THAT YOUR SHOULDER IS SUPPOSED TO GO THROUGH. Lowering the bar (or dumb bells) all the way to your chest can cause shoulder injuries!
People will argue that it ia not full ROM, but I prefer to have 100% functioning pain free shoulders.
Hope this helped you. I can back this up with a good article if anyone like that will FULLY decribe what I just went through in greater detail.
Hope it helped....
Take it easy,
Nate.
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