What causes tight trapezius muscles? ADVERTISEMENT 1.81K viewsApril 25, 2013 0 M April 25, 2013 0 Comments 7 Answers ActiveVotedNewestOldest 0 Sue0 Posted 0 Comments Sitting at a computer or desk all day Overtraining opposite muscle groups You are viewing 1 out of 7 answers, click here to view all answers. Register or Login