ok, so i'm wondering if there's any other effective exersizes out there for strengthening the rotary cuff besides shrugs.
basically, when I do chest or something like that, it feels like my left shoulder pops out of place after a few reps. so i've been working on strengthening the rotary cuff with shrugs - and in case theres different kinds of shrugs or something, what i do is where you shrug your shoulders and hold for a few seconds, then squeeze your shoulderblades together kinda thing and hold that for a few seconds, and then go back to relaxed for a few seconds.
Anyway, is there any other exersizes out there that I should be doing as well?