A comparison of cluster-based exposure variation and exposure variation analysis to detect muscular adaptation in the shoulder joint to subsequent sessions of eccentric exercise during computer work |
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| Affiliation: | 1. School of Electrical Engineering and Automation, Tianjin University, Tianjin, China;2. Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China;1. Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya 467-8601, Japan;2. Department of Pharmacology, Gifu University Graduate School of Medicine, Gifu 501-1194, Japan;3. Department of Clinical Laboratory, National Center for Geriatrics and Gerontology, Obu, Aichi 474-8511, Japan;1. Department of Internal Medicine, Far Eastern Memorial Hospital, New Taipei City, Taiwan;2. Oriental Institute of Technology, New Taipei City, Taiwan;3. Research and Diagnostic Center, Centers for Disease Control, Department of Health, Taipei, Taiwan;4. Department of Laboratory Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan;5. Department of Clinical Laboratory Sciences and Medical Biotechnology, National Taiwan University College of Medicine, Taipei, Taiwan;6. Center for Infection Control, National Taiwan University Hospital, Taipei, Taiwan;7. Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan;8. Field Epidemiology Training Program, Centers for Disease Control, Department of Health, Taipei, Taiwan;9. Department of Medical Research, China Medical University Hospital, Taichung, Taiwan;10. China Medical University, Taichung, Taiwan;1. GEUS, Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark;2. BGS, British Geological Survey, Keyworth, Nottingham NG12 5GG, United Kingdom;1. Sorbonne Universités, Université Pierre et Marie Curie, CNRS UMR7371 & INSERM U1146, Laboratoire d’Imagerie Biomédicale, Paris FR-75006, France;2. Arts et Métiers ParisTech, LBM, 151 Boulevard de l’Hôpital, Paris, France;3. Université de Lyon, F-69622 Lyon, France;4. Université Claude Bernard Lyon 1, Villeurbanne, France;5. IFSTTAR, UMR_T9406, LBMC Laboratoire de Biomécanique et Mécanique des Chocs, F69675 Bron, France;6. CREATIS, CNRS UMR 5220, Inserm, U1044, Université de Lyon; Université Lyon 1, INSA-Lyon; 69621, Villeurbanne, France;7. European Synchrotron Radiation Facility, X-Ray Imaging Group, 38043 Grenoble, France;8. Université Lyon I, Lyon, France;9. ESRF, Grenoble, France |
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| Abstract: | The aim of this study was to compare the capability of a cluster-based exposure variation (C-EVA) with a conventional exposure variation analysis (EVA) to detect muscular adaptation in the shoulder joint to subsequent sessions of eccentric exercise (ECC). Eleven healthy subjects performed work with a computer mouse for 10 min at three instants, i.e., before, immediately after, and 24 h after ECC. The subjects repeated an identical procedure one week after the first session. Surface electromyography was recorded from descending and ascending part of the trapezius, deltoid anterior, and serratus anterior muscles. EVA and C-EVA were performed and their marginal distributions were extracted. A principal component analysis was applied to the marginal distributions of both EVA and C-EVA. Principal component difference was computed by subtraction of the corresponding principal components before the ECC from immediately after and 24 h after the ECC. The first component extracted from C-EVA revealed an interactive effect between the sessions of ECC and instants whereas this effect was absent using the conventional EVA. The current study highlights the importance of a multivariate approach to analyze the potentially important changes in muscular activity in response to the repeated bout effect. |
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| Keywords: | Physical work load Delay onset muscle soreness Repeated bout effect Muscular reorganization |
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