الفهرس 
Low level laser therapy versus eccentric exercises in treatment of shoulder Impingement syndrome
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Abstract
Background : Subacromial impingement syndrome (SIS) is the most common cause of shoulder pain, accounting for 44-65% of all shoulder pain complaints. Purpose: to investigate the effect of low level laser therapy (LLLT) versus the eccentric exercises in the treatment of SIS. Subjects: Thirty patients diagnosed as right unilateral SIS with age range between 25- 45 years, from both genders, complaining for at least 3 months and a maximum of 6 months. They were randomly assigned into 2 groups, group A (8 female and 7 male) received LLLT in addition to strengthening and flexibility exercises and group B (11 female, 4 male) received eccentric exercises in addition to the same exercises as in group A. Both groups received 4 weeks of training. Methods: Patients were evaluated pre and post treatment for pain, functional activity, and tendon structure (represented as supraspinatus tendon echotexture and thickness) using visual analogue scale (VAS), shoulder pain and disability index (SPADI) and ultrasonography (US) respectively. Results: There was significant improvement in both groups for pain, supraspinatus tendon structure and thickness with no significant difference between both groups. On the other hand, the functional activity was improved in both groups with significant improvement in favor of group B. Conclusion: Both LLLT and eccentric exercises are effective in the treatment of SIS when added to scapular and rotator cuff muscles strengthening. However, the eccentric exercises are more effective than LLLT regarding the shoulder function