TAILIEUCHUNG - Báo cáo y học: "Altered muscular activation during prone hip extension in women with and without low back pain"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: Altered muscular activation during prone hip extension in women with and without low back pain. | Arab et al. Chiropractic Manual Therapies 2011 19 18 http content 19 1 18 CHIROPRACTIC MANUAL THERAPIES RESEARCH Open Access Altered muscular activation during prone hip extension in women with and without low back pain Amir M Arab1 Leila Ghamkhar1 Mahnaz Emami2 and Mohammad R Nourbakhsh3 Abstract Background Altered movement pattern has been associated with the development of low back pain LBP . The purpose of this study was to investigate the activity pattern of the ipsilateral erector spinae IES and contralateral erectorspinae CES gluteus maximus GM and hamstring HAM muscles during prone hip extension PHE test in women with and without LBP. A cross-sectional non-experimental design was used. Methods Convenience sample of 20 female participated in the study. Subjects were categorized into two groups with LBP n 10 and without LBP n 10 . The electromyography EMG signal amplitude of the tested muscles during PHE normalized to maximum voluntary electrical activity MVE was measured in the dominant lower extremity in all subjects. Results Statistical analysis revealed greater normalized EMG signal amplitude in women with LBP compared to non-LBP women. There was significant difference in EMG activity of the IES P and CES P between two groups. However no significant difference was found in EMG signals of the GM P and HAM P among two groups. Conclusion The findings of this study demonstrated altered activation pattern of the lumbo-pelvic muscles during PHE in the women with chronic LBP. This information is important for investigators using PHE as either an evaluation tool or a rehabilitation exercise. Keywords Electromyography Low back pain Movement pattern Prone hip extension Background Low back pain LBP is one of the most common and costly musculoskeletal complaints in today s societies affecting up to 70-80 of the population at least one episode during their lifetime 1 2 . Despite its high incidence and detrimental effects on individuals

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