递增式踏车运动中肌电图信号的间歇可靠性：股四头肌。
Intersession reliability of the electromyographic signal during incremental cycle ergometry: quadriceps femoris.
机构信息
Integrative Physiology of Exercise Laboratory, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, Michigan 48201, USA.
出版信息
Muscle Nerve. 2011 Dec;44(6):937-46. doi: 10.1002/mus.22211.
INTRODUCTION
The purposes of this investigation were to determine the: (1) reproducibility of the patterns of responses for electromyographic (EMG) amplitude and mean power frequency (MPF); and (2) intraclass correlation coefficient (ICC) of the EMG amplitude and MPF during three incremental cycle ergometer tests separated by 48 hours.
METHODS
Ten men performed incremental cycle ergometry tests to exhaustion on three separate occasions. Surface EMG signals were recorded simultaneously from the three superficial quadriceps muscles at each trial.
RESULTS
Polynomial regression indicated that, for >95% of the cases, the best-fit model was the same at each trial for EMG amplitude but not for EMG MPF. The ICC values were high for EMG amplitude but low for EMG MPF.
CONCLUSIONS
These results indicate that EMG amplitude is a reliable measure of motor unit activation strategy during incremental cycle ergometry, whereas the EMG MPF was unreliable.
简介
本研究旨在确定：（1）肌电图（EMG）振幅和平均功率频率（MPF）反应模式的可重复性；（2）相隔 48 小时的三次递增式功率自行车测试中 EMG 振幅和 MPF 的组内相关系数（ICC）。
方法
10 名男性在三次不同的情况下进行递增式功率自行车测试直至力竭。在每次试验中，从三个表面股四头肌同时记录表面 EMG 信号。
结果
多项式回归表明，对于 >95%的情况，EMG 振幅的最佳拟合模型在每次试验中是相同的，但 EMG MPF 并非如此。EMG 振幅的 ICC 值较高，但 EMG MPF 的 ICC 值较低。
结论
这些结果表明，在递增式功率自行车测试中，EMG 振幅是运动单位激活策略的可靠测量指标，而 EMG MPF 则不可靠。
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