Acute effects of superimposed electromyostimulation during cycling on myokines and markers of muscle damage |
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Authors: | P Wahl M Hein S Achtzehn W Bloch J Mester |
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Institution: | 1.Institute of Training Science and Sport Informatics, German Sport University Cologne, Germany;2.Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University Cologne, Germany;3.The German Research Centre of Elite Sport, German Sport University Cologne, Germany |
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Abstract: | Objectives:The purpose of the present study was to evaluate the effects of superimposed electromyostimulation (E) during cycling on myokines and markers of muscle damage, as E might be a useful tool to induce a high local stimulus to skeletal muscle during endurance training without performing high external workloads.Methods:13 subjects participated in three experimental trials each lasting 60 min in a randomized order. 1) Cycling (C), 2) Cycling with superimposed E (C+E) and 3) E. Interleukin-6 (IL-6), brain-derived neurotrophic factor (BDNF), creatine kinase (CK) and myoglobin were determined before (pre) and 0’, 30’, 60’, 240’ and 24h after each intervention.Results:Only C+E caused significant increases in levels of CK and myoglobin. BDNF and IL-6 significantly increased after C and C+E, however increases for IL-6 were significantly higher after C+E compared to C.Conclusion:The present study showed that superimposed E during cycling might be a useful tool to induce a high local stimulus to skeletal muscle even when performing low to moderate external workloads. This effect might be due the activation of additional muscle fibers and mild eccentric work due to the concomitant activation of agonist and antagonist. However the higher load to skeletal muscle has to be taken into account. |
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Keywords: | IL-6 BDNF Creatine Kinase Myoglobin Perceived Physical Pain |
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