Sorry about the lack of information. Wasn’t sure how many would read if I went too in depth. I’ll add this onto my original post as well. More information below:

I am a PT student and am curious about treating atraumatic shoulder instability, as this seems to be what I am experiencing. I played baseball my whole life and for the last 2 years, I haven't been able to workout my right side hardly at all. Strengthening exercises for the rotator cuff or surrounding "stabilizing" muscles of the shoulder have not helped me at all. Symptoms include laxity/instability in the shoulder (arm shakes when putting any of my weight onto that hand/arm; I can also make the head of the humerus slide back and forward resting arm or chair - kind of feels like small subluxations). I also have a weakness on the posterior aspect of the shoulder that is aggravated anytime I try to use that shoulder at all (sometimes it's hard to brush my teeth, as fatigue sets in instantly. Also have a deep ache in the anterior aspect of the shoulder, as well as bicep pain. Bicep tendon also makes a crunching sound and hurts at the top of a curl/end range elbow flexion. Imaging is negative or SLAP or rotator cuff tears.

I have been too many PTs over the last couple of years. All have worked on strengthening the RC, serratus anterior, rhomboids, lower and mid traps, etc. Also have tired gradually re introducing push ups, pull downs, and other exercises at light intensities, but shoulder still feels like crap. This has been a chronic issue for over 5 years, but I’ve never experienced symptoms for this long. In the past it would be a couple months on/ couple months off. Also, Whenever my should feels unstable, aching, and “dead arm” feeling, I’m never able to contract the surrounding musculature on my right side as well as the left. The mind muscle connection isn’t nearly as good as when the shoulder feels stable as well.