EMPTY CAN FOR SUBACROMIAL PAIN SYNDROME AND ISOLATED SUPRASPINATUS TESTING? The empty can (EC) test have been promoted as being able to isolate activity to supraspinatus and are therefore diagnostic of supraspinatus dysfunction. However, Boettcher et al. (2009) examined the EMG activity of 13 muscles in 15 normal subjects and found that the EC test also equally activated nine other shoulder muscles: On the other hand, Jain et al. (2017) have evaluated this test with the goal of diagnosing rotato