IRCT2015100724412N1 IRCT 2016-05-06 Vice Chancellor for Research of Tabriz University of Medical Sciences (TUOMS). Effects of physiotherapy techniques on painful points of trapezius muscle The Effects of Manual Passive Muscle Shortening and Positional Release Therapy on Upper Trapezius Latent Myofascial Trigger Point: A randomized double blinded clinical trial 2016-05-09 anticipated 30 Complete https://irct.ir/trial/20625 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Other design features: Randomization will be applied using a computer generated randomized block of numbers. 2-3 Myofascial trigger points-Myofascial pain syndrome. Intervention 1: Control group: Subjects in this group will be treated by classical Positional Release Therapy. The subject will be in supine with therapist standing on the affected side. Pressure is applied to the trigger point. The subject’s head is laterally flexed toward the side of trigger point, then therapist grasps the subject’s forearm and abducts shoulder to approximately 90°.The ideal position of comfort achieved (the point where a reduction in pain of at least 70% was produced) will be held for a period of 90 seconds and followed by a passive return of the body part to an anatomically neutral position. Technique will be repeated three times with one minute intervals. Intervention 2: Intervention group: Participants in this group will be treated by Manual Passive Muscle Shortening. The participant will be in prone position with therapist standing on the affected side. Origin and insertion of the upper trapezius muscle will be approximated by the hands of therapist and this position will be hold for 90 seconds. Technique will be repeated three times with one minute intervals.