Background and Objective - Shoulder Impingement Syndrome (SIS) is a common cause of shoulder pain in adults. People with this condition experience pain related to the shoulder's tendons and soft tissues when lifting the arm overhead. The Pectoralis Minor muscle was found to be significantly more active during elevation in subjects with SIS. Increased activity is indicative of a shortened muscle. When this muscle is in a shortened position however, it can limit scapular upward rotation, which is necessary for shoulder elevation, while causing excessive anterior tilting and internal rotation of the scapula. The increased anterior tilt and internal rotation caused by Pectoralis Minor tightness mechanically reduce the Subacromial space, and has been associated with symptoms commonly seen with SIS. Physiotherapy techniques like Myofascial Release (MFR) and Muscle Energy Technique (MET) have been proposed as an adjunct to Conventional therapy to treat Shoulder Impingement Syndrome. Both the techniques have been proven to be effective on increasing Pectoralis Minor length, reducing Pain, improving Function in Subjects with Shoulder Impingement Syndrome and studies are limited on their Comparison. Hence need of the Study arise. Methods - Prospective study design. 64 subjects with age groups between 18 and 35 years having a Clinical Diagnosis of Shoulder Impingement Syndrome were randomly allocated in to two groups. In Group A (n=32) subjects were treated with Myofascial Release (MFR) whereas in Group B (n=32) subjects received Muscle Energy Technique, Participants were given intervention thrice a week for 6 weeks. The outcome measures of this intervention were measured in term of VAS for Pain, SPADI for Function and PMI for Pectoralis Minor Length. Result - Independent‘t’test was used to compare the mean significance difference between continuous variables. Paired‘t’test was used to assess the Statistical significance difference between Pre and Post test scores. Statistical analysis of the data revealed that within the group comparison, both groups showed significant improvement in all parameters. Whereas in between the group’s comparison Muscle Energy Technique showed better improvement when compared to Myofascial Release. Conclusion - After 6 weeks of intervention, Both Myofascial Release and Muscle energy technique intervention showed significant improvement on Pectoralis minor length, Pain and function. However, Muscle Energy Technique group is found to be more effective when compared to Myofascial Release group. From the findings of the current study, it is recommended that Muscle energy technique protocol may be incorporated in the management of Shoulder Impingement Syndrome

Keywords : Shoulder Impingement Syndrome, Pectoralis Minor Length, Myofascial Release, Muscle Energy Technique