The effects of interelectrode distance on electromyographic amplitude and mean power frequency during incremental cycle ergometry.
作者： Moh H. Malek , Terry J. Housh , Jared W. Coburn , Joseph P. Weir , Richard J. Schmidt
DOI: 10.1016/J.JNEUMETH.2005.06.025
关键词: Amplitude 、 Mathematics 、 Control theory 、 Cycle ergometry 、 Electromyography 、 Polynomial regression 、 Statistics 、 Analysis of variance 、 Mean frequency 、 Motor unit recruitment 、 Repeated measures design
摘要: The purpose of this study was to examine the effects interelectrode distance (IED) on relationships absolute and normalized EMG amplitude mean power frequency (MPF) versus output during incremental cycle ergometry. Eleven adults (mean +/- S.D. age = 24.2 2.6 y; V(O2max) 49.4 8.3 ml kg(-1) min(-1)) performed ergometry tests. Surface signals were recorded simultaneously from bipolar electrode arrangements placed over VL muscle with IEDs 20, 40, 60 mm. Polynomial regression analyses used describe for (muV(rms) % max) MPF (Hz (%max) each subject at three IEDs. In addition, separate one-way repeated measures ANOVAs differences between outputs 80, 110, 140, 170 W. results polynomial revealed that best fit model IED linear six 11 subjects quadratic five subjects. For MPF, four exhibited significant (linear or quadratic) across least one IED. There no differences, however, indicated there consistent patterns responses individual mm current findings supported process normalization data obtained when comparisons are made different
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