Objectivity and Validity of EMG Method in Estimating Anaerobic Threshold
Objectivity and Validity of EMG Method in Estimating Anaerobic Threshold
复制标题
肌电图法估算无氧阈值的客观性和有效性
DOI：
10.1055/s-0033-1361182
复制
发表时间：
2014
影响因子：
2.5
通讯作者：
H. Eom
中科院分区：
文献类型：
--
作者：
S.;J. Kim;M. Kwon;H. Eom
本研究的目的是验证和比较不同过滤间隔(9，15，20，25，30 S)的无氧阈值(AT)点估计的性能，并探讨由呼吸阈值(VT)估计的AT点与在自行车功率计上利用肌电活动获得的肌肉疲劳阈值之间的相互关系。69名未受过训练的男大学生自愿参加了这项研究。采用递增训练方案，以每分钟20瓦的功率输出持续递增，直到筋疲力尽。用V-斜率程序和气体交换参数以相同的方式估计At点。总体而言，与VT法相比，EMG法计算的AT点时间在5个滤波间隔上的估计值更为一致，且它们之间具有更高的相关性。本研究结果提示，肌电信号可以作为估计AT点的一种替代或一种新的选择。此外，在MatLab中实现的用于肌电信号分析的拟议计算程序似乎是有效和可靠的，因为它产生了几乎相同的值，并与VT估计值高度相关。
Abstract The purposes of this study were to verify and compare the performances of anaerobic threshold (AT) point estimates among different filtering intervals (9, 15, 20, 25, 30 s) and to investigate the interrelationships of AT point estimates obtained by ventilatory threshold (VT) and muscle fatigue thresholds using electromyographic (EMG) activity during incremental exercise on a cycle ergometer. 69 untrained male university students, yet pursuing regular exercise voluntarily participated in this study. The incremental exercise protocol was applied with a consistent stepwise increase in power output of 20 watts per minute until exhaustion. AT point was also estimated in the same manner using V-slope program with gas exchange parameters. In general, the estimated values of AT point-time computed by EMG method were more consistent across 5 filtering intervals and demonstrated higher correlations among themselves when compared with those values obtained by VT method. The results found in the present study suggest that the EMG signals could be used as an alternative or a new option in estimating AT point. Also the proposed computing procedure implemented in Matlab for the analysis of EMG signals appeared to be valid and reliable as it produced nearly identical values and high correlations with VT estimates.