The effect of EMG biofeedback training on muscle activation in an impingement population |
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| Affiliation: | 1. Institut de recherche Robert Sauvé en santé et en sécurité du travail, Montréal, Canada;2. Division of Applied Mechanics, Department of Mechanical Engineering, Polytechnique Montréal, Canada;3. Department of Physical Activity Sciences, University of Sherbrooke, Canada;4. Center for Interdisciplinary Research in Rehabilitation of Greater Montreal (CRIR), Institut universitaire sur la réadaptation en déficience physique de Montréal (IURDPM), Centre intégré universitaire de santé et de services sociaux du Centre-Sud-de-l’Ile-de-Montréal (CCSMTL), Canada;1. The University of Queensland, NHMRC Centre of Clinical Research Excellence in Spinal Pain, Injury & Health, School of Health & Rehabilitation Sciences, QLD 4072, Australia;2. Centre interdisciplinaire de recherche en réadaptation et integration sociale (CIRRIS), Université Laval, Québec, QC G1V 0A6, Canada;1. Department of Sports Science, Zhejiang University, Hangzhou, China;2. Department of Rehabilitation Medicine, First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China;3. Center for Psychological Science, Zhejiang University, Hangzhou, China;4. Accademia di Belle Arti di Brera, Milan, Italy;1. Center for General Education, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota-shi, Aichi 470-0392, Japan;2. Laboratory of Neuromuscular Biomechanics, School of Health and Sport Sciences, Chukyo University 101 Tokodachi, Kaizu-cho, Toyota-shi, Aichi 470-0393, Japan;3. Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 46, 2000 Maribor, Slovenia;1. University of Maribor, Faculty of Medicine, Institute of Sports Medicine, Maribor, Slovenia;2. Science and Research Centre Koper, Institute for Kinesiology Research, Koper, Slovenia;3. University of Ljubljana, Faculty of Sport, Ljubljana, Slovenia;4. Faculty of Sports Studies, Masaryk University, Brno, Czech Republic;5. Department of Health Sciences, Alma Mater Europaea – ECM, Maribor, Slovenia;1. Istanbul Physical Therapy Rehabilitation Training and Research Hospital, Istanbul, Turkey;2. Istanbul Gelisim University, Faculty of Dentistry, Avcilar, Istanbul, Turkey;3. Istanbul Gelisim University, Faculty of Engineering, Avcilar, Istanbul, Turkey |
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| Abstract: | Subacromial impingement syndrome (SAIS) is one of the most diagnosed causes of pain in the upper extremity. The purpose of this study was to investigate muscle activity between asymptomatic and SAIS shoulders on the same subject while understanding the effectiveness of EMG biofeedback training (EBFB) on bilateral overhead movements. Ten participants (7 male), that tested positive for 2/3 SAIS clinical tests, volunteered for the study. Bilateral muscle activity was measured via electrodes on the upper trapezius (UT), lower trapezius (LT), serratus anterior (SA), and lumbar paraspinals (LP). Participants performed bilateral scapular plane overhead movements before and after EBFB. EBFB consisted of 10 bilateral repetitions of I, W, T, and Y exercises focused on reducing UT and increasing LT and SA activity. Prior to EBFB, no significant difference in muscle activity was present between sides. A significant main effect of time indicated that after EBFB both sides exhibited reduced UT activity at 60° (p = 0.003) and 90° (p = 0.036), LT activity was increased at all measured humeral angles (p < 0.0005), and SA muscle activity was increased at 110° (p = 0.001). EBFB in conjunction with scapular based exercise effectively alters muscle activity of asymptomatic and symptomatic scapular musculature. |
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| Keywords: | Scapula Electromyography Kinematics Biofeedback Impingement |
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