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In a recent paper by author sonakshi sehgal, Siddhartha sen & amit dhawan, they used MET treatment for three times a week for 2 weeks and measure Glenehumeral internal rotation & isometric strength of internal rotator muscle before the starting of treatment and after 1st & 2nd week.
Overhead athletes commonly exhibit greater GHJ external rotation ROM at 90° of abduction of the dominant arm as compared to the non-dominant arm. However, the total arc of motion (sum of maximum GHJ external rotation and internal rotation ROM at 90° of abduction) often does not differ bilaterally, suggesting a corresponding decrease in GHJ internal rotation ROM. This loss of GHJ internal rotation ROM at 90° of abduction in the dominant shoulder is referred to as glenohumeral internal rotation deficit (GIRD)
Muscle energy techniques are a class of soft tissue manipulation methods that incorporate precisely directed and controlled, patient initiated, isometric and/or isotonic contractions, designed to improve musculoskeletal function and reduce pain.
In this paper they concluded that the muscle energy technique showed remarked improvement in the range of motion and strength of internal rotators in athletes with GIRD. Therefore it is suggested that the technique can be used in acute cases of posterior shoulder tightness to prevent the occurrence of other shoulder injuries.