[Cloud9Fitness]

Overhead shrugs are a good exercise, but the problem with them is the same one that may be a problem with upright rows. If you have poor scapular rotation you will likely impinge at some point after ABducting 120 degrees. This is why it is on some peoples' "do not do" list. However, if you want to fix the problem you need to improve your mechanics for getting into that range. So I would actually start with upright rows and a lower weight first to repeatedly train the upward rotator to function. If you need to, get a trainer or friend to provide manual scapular rotation towards the end of a set (this may work best with single hand upright rows).

If you think about it, the end of the upright row and the overhead shrug are exactly the same. Except in one the elbows are flexed and in the other the elbows are extended. The elbow position does not affect the upper trap.