What are the SITS muscles at the rotator cuff? Which is the weakest and most often injured based on research? ADVERTISEMENT 515 viewsMay 1, 2015 0 Chris0 July 15, 2012 0 Comments 6 Answers ActiveVotedNewestOldest 0 Harry Posted 0 Comments http://www.massagetherapy.com/articles/index.php/article_id/812/Shoulder… You are viewing 1 out of 6 answers, click here to view all answers. Register or Login