Reliability of surface electromyography for the gluteus medius muscle during gait in people with and without chronic nonspecific low back pain |
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| Institution: | 1. Discipline of Podiatry, University of Newcastle, Ourimbah, NSW 2258, Australia;2. Priority Research Centre for Physical Activity and Nutrition, University of Newcastle, Newcastle, NSW 2308, Australia;1. Royal College of Surgeons in Ireland, Dublin 2, Ireland;2. First Affiliated Hospital of Wenzhou Medical College, Wenzhou, China;3. Central Remedial Clinic, Clontarf, Dublin 3, Ireland;1. Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Alberta, Canada;2. Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Alberta, Canada;3. Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Alberta, Canada;4. The Alberta Children’s Hospital Research Institute for Child and Maternal Health, Cumming School of Medicine, University of Calgary, Alberta, Canada;1. Lower Extremity & Gait Studies Research Group, La Trobe University, Australia;2. Department of Physiotherapy, La Trobe University, Australia;3. Department of Rural Human Biosciences, La Trobe University, Australia;4. Department of Podiatry, La Trobe University, Australia;1. Research Development Center, Saitama Prefectural University, Saitama 343-8540, Japan;2. Sportology Center, Graduate School of Medicine, Juntendo University, Tokyo 113-8421, Japan;3. Graduate Course of Health and Social Services, Saitama Prefectural University, Saitama 343-8540, Japan;1. Department of Engineering, Roma TRE University, Rome, Italy;2. Department of Medico-Surgical Sciences and Biotechnologies, University of Rome Sapienza, Latina, Italy;3. Rehabilitation Centre, Policlinico Italia, Rome, Italy;4. Department of Occupational and Environmental Medicine, Epidemiology and Hygiene, INAIL, Monte Porzio Catone, Rome, Italy;5. Fondazione Don Gnocchi, Milan, Italy |
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| Abstract: | The purpose of this study was to determine the intratester reliability of surface electromyography (EMG) assessment of the gluteus medius muscle in healthy people and people with chronic nonspecific low back pain (CNLBP) during barefoot walking. Gluteus medius muscle activity was measured twice in 40 people without and 30 people with CNLBP approximately 7 days apart. Walking gluteus medius muscle activity was normalised to maximal voluntary isometric contractions during side-lying hip abduction with manual resistance. Good intratester reliability (ICC > 0.75) was found for mean, peak, and peak to peak amplitude for healthy people. Only mean amplitude demonstrated good intratester reliability in those with CNLBP. Peak amplitude and peak to peak amplitude of the gluteus medius muscle of those with CNLBP, and the time of peak amplitude in both groups, demonstrated moderate reliability (ICC ranged from 0.50 to 0.58). Moderate to large standard error of measurement and minimal detectable change values were reported for outcome measurements. These results suggest that potentially large levels of random error can occur between sessions. Future research can build on this study for those with pathology and attempt to establish change values for EMG that are clinically meaningful. |
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| Keywords: | Intratester reliability Surface electromyography Healthy Chronic low back pain Gluteus medius |
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