The Effects of Active Therapeutic Exercises on the Electromyographic Activity of Lumbopelvic Muscles during Prone Hip Extension in Patients with Chronic Non-Specific Low Back Pain

introduction: lbp is one of the most common health issues throughout the world and hasmultiple causes which one of them is the defect in motor patterns. this study compared theeffectiveness of stability, general and mixed exercises on the electromyographic activityof ipsilateral erector spinae muscle (ies), contralateral erector spinae muscle (ces), gluteusmaximus (gm) and medial hamstring (mh) during prone hip extension (phe) in patients withnonspecific chronic low back pain (nsclbp). methods: the study used an interventional quasi-experimental design. thirty patients withnsclbp between the ages of 20 to 40 years were randomly divided into 3 groups (each withten patients) including stability, general and mixed groups. the study was conducted in springand summer of 2014 in amir physical clinic in isfahan. mvea of the muscles was measuredusing surface electromyography (emg) prior and after exercises during phe. exercises weredone for 10 sessions and 3 times per week. the obtained data by spss (version 22) and usingthe kolmogorov- smirnov test, independent t–test paired t test and ancova were analyzed. results: mvea of gm (p=0.036) significantly increased in the group who practiced with mixedexercises. also‚ the exercises decreased mvea of ies‚ mh and ces. besides, this decrease fories (p=0.024) was significant but for mh (p=0.973) and ces (p=0.111) were not. however, thestatistical results did not show any significance among any two and or all three groups. conclusion: the findings of this study revealed that mixed exercises are more effective thanstability and general exercises on the emg activity of lumbo- pelvic muscles and could alter theelectrical activity pattern of these muscles.