从单次跑步机测试中估计肌电图和心率疲劳阈值。
Estimating electromyographic and heart rate fatigue thresholds from a single treadmill test.
机构信息
Wayne State University, Eugene Applebaum College of Pharmacy & Health Sciences, 259 Mack Avenue, Room 2248, Detroit, Michigan 48201, USA.
出版信息
Muscle Nerve. 2012 Oct;46(4):577-81. doi: 10.1002/mus.23345.
INTRODUCTION
The purposes of this study were to (1) develop a fatigue threshold based on electromyography (EMG) and heart rate (HR) responses for treadmill running from a single incremental test; and (2) propose a new fatigue threshold called the RV(EMGFT) and RV(HRFT).
METHODS
Eleven men performed incremental treadmill exercise to exhaustion on a single occasion. The RV(EMGFT) and RV(HRFT) were defined as the average of the highest velocity that resulted in a nonsignificant slope coefficient for the EMG amplitude versus time relationship and the lowest velocity that resulted in a significant positive slope coefficient.
RESULTS
There was a significant (P < 0.05) difference between the 2 thresholds [RV(EMGFT) = 11.7 ± 0.6 km/h and RV(HRFT) = 8.3 ± 0.8 km/h].
CONCLUSIONS
The fatigue threshold for EMG amplitude and heart rate can be determined from a single incremental treadmill test, but there are differences between cardiac and neuromuscular factors of fatigue.
简介
本研究旨在：（1）从单次递增测试中开发基于肌电图（EMG）和心率（HR）反应的跑步机疲劳阈值；（2）提出一个新的疲劳阈值，称为 RV(EMGFT)和 RV(HRFT)。
方法
11 名男性在单次递增跑步机运动中达到力竭。RV(EMGFT)和 RV(HRFT)被定义为 EMG 幅度与时间关系的斜率系数无显著变化的最高速度和斜率系数呈显著正相关的最低速度的平均值。
结果
这两个阈值之间存在显著差异（P < 0.05）[RV(EMGFT) = 11.7 ± 0.6 km/h 和 RV(HRFT) = 8.3 ± 0.8 km/h]。
结论
可以从单次递增跑步机测试中确定肌电图幅度和心率的疲劳阈值，但在心脏和神经肌肉疲劳因素之间存在差异。
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