Comparative study of shock wave therapy and Laser therapy effect in elimination of symptoms among patients with myofascial pain syndrome in upper trapezius

BACKGROUND The aim of this study is to compare the effects of laser therapy and shock wave therapy for symptoms treatment among patients with MPS in the upper trapezius muscle. MATERIALS AND METHODS In a clinical trial study, 46 patients were selected based on the clinical criteria and physiathrist diagnosis. Subjects were randomized into two groups as follows: Twenty individuals were assigned to exercise-medication-laser therapy group, and 26 to exercise-medication-shock wave therapy group. The pain was assessed based on visual analog scale (VAS), neck disability index (NDI), and SPADI in three stages: Before treatment, subsequently after treatment, and a month after treatment. RESULTS One man and 19 women, age group of 45.3 ± 7.7 years, were assigned into laser therapy group. Two men and 24 women, average age group of 42.3 ± 10.4 were assigned into shock wave therapy group. A significant difference was found among our study groups before treatment and after starting treatment for VAS, NDI, and SPDI indices, that is, two methods of treatments were effective (P < 0.001). However, among these two treatment methods, laser therapy provided higher effect on VAS and NDI as compared to the radial shock wave method (P < 0.05) in 2 weeks from starting the treatment (consequent to treatment). CONCLUSION According to this study results, we can conclude that shock wave and laser therapy results on similar effect in long-term for relieve of pain and eliminating symptoms in patients with myofascial but laser provides a faster optimal results.