Lately I've been having trouble with some of the attachments on my proximal humerus too - not 100% sure which muscle it is - and I've gotten a lot of relief from kinesio taping across my chest.
I cut a strip in half, on me five blocks long (you're about my same size but you'll want to measure yourself the first time). I put my shoulder in full external rotation ... hitchhiker thumb, wrist supinated hard, elbow bent open, maybe 100-120°, and not too close to my ribs, then bring my thumb as far back as I can to pull the shoulder back. Then I tape across the upper chest under the clavicles. Anchor below the SC joint just on the opposite side of the sternum - so the anchors will cross each other when you're done - and tape with zero stretch on the tape all the way to the upper arm. I don't quite parallel the clavicles, but that might depend on how they sit on you - but at least you want to make sure you keep the tape over the muscle and don't tape on top of the clavicle. Just keep the tape as straight as I can all the way to the other end somewhere over the anterior or medial delt.
I was surprised how much relief this is giving me now, because over the winter, when my symptoms were mostly more central and my DOM showed me how to tape this way, it only seemed to help a little.
I do spend a few seconds arranging myself before I go to sleep. Chin tucked "just so" - I actually pick my head up in my hands so I can relax my neck while I place my head - a rolled hand towel under my neck to support the curve - a U-pillow with its legs on either side of my head to keep my head from rolling side to side when I sleep - and the last thing I do is externally rotate my shoulders, hard.
But then again, my symptoms pretty much disappear when I'm flat on my back. So none of this might have any relevance to your situation.
Last edited by OakLeaf; 07-03-2013 at 02:29 AM.
Speed comes from what you put behind you. - Judi Ketteler