just got back from the gym. Shoulder day. stretched thoroughly, and sat down for some mp warm up.no weight just the bar, hammered out about 30. felt fine. added dimes, hit about my 20th rep and seriously sharp cuttting pain inside my shoulder socket. rested, stretched, still hurting, but tried another set. same pain. this had happend once before, but not as bad, last time it happend i upped the weight to my usual work sets and it went away.
did the same thing, and sure enough, no pain. zilch, nada. added more weight. squeezed out 8. felt great, more weight 6 fine.
dropped down to dimes again. for a burn out set, about 15 same sharp pain in my shoulder.
any ideas?