...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Musculoskeletal and Neuronal Interactions >Time course of changes in neuromuscular responses during rides to exhaustion above and below critical power
【24h】

Time course of changes in neuromuscular responses during rides to exhaustion above and below critical power

机译：乘骑过程中，高于或低于关键力量时，神经肌肉反应变化的时间过程

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Objectives: To examine the time course of changes in electromyographic (EMG) and mechanomyographic (MMG)amplitude (AMP) and mean power frequency (MPF) responses during cycle ergometry to exhaustion performed above(CP+10%) and below (CP-10%) critical power (CP) to infer motor unit activation strategies used to maintain power output.Methods: Participants performed a 3-min all out test to determine CP, and 2 randomly ordered, continuous rides toexhaustion at CP+10% and CP-10%. V.O2, EMG AMP, EMG MPF, MMG AMP, MMG MPF, and time to exhaustion (Tlim) wererecorded. Responses at CP-10% and CP+10% were analyzed separately. Results: At CP-10%, EMG and MMG AMP weresignificantly greater than the initial 5% timepoint at 100% Tlim. EMG MPF and MMG MPF reflected a downward trend thatresulted in no significant difference between timepoints. At CP+10%, EMG AMP was significantly greater than the initial5% timepoint from 60% to 100% Tlim. MMG AMP was less than the initial 5% timepoint at only 50% Tlim. EMG and MMGMPF were significantly less than the initial 5% timepoint at 20% Tlim and 100% Tlim, respectively. Conclusions: The timecourseof changes in EMG and MMG signals were different at CP-10% and CP+10%, but responses observed indicated cycleergometry to exhaustion relies on similar motor unit activation strategies.
机译：目的：研究在循环测功过程中，对高于（CP + 10％）和低于（CP-10）执行的疲劳过程中，肌电图（EMG）和机电图（MMG）幅值（AMP）和平均功率频率（MPF）的变化的时程。 ％）临界功率（CP）来推断用于维持功率输出的电机单元激活策略。方法：参与者进行了3分钟的全力测试以确定CP，并随机进行了2次以CP + 10％和CP- 10％。记录V.O2，EMG AMP，EMG MPF，MMG AMP，MMG MPF和衰竭时间（Tlim）。分别分析了CP-10％和CP + 10％时的响应。结果：在CP-10％时，EMG和MMG AMP显着大于100％Tlim时的初始5％时间点。 EMG MPF和MMG MPF反映出下降趋势，导致时间点之间没有显着差异。在CP + 10％时，EMG AMP从60％到100％Tlim明显大于初始5％时间点。 MMG AMP仅在Tlim仅为50％时小于最初的5％时间点。在20％Tlim和100％Tlim时，EMG和MMGMPF分别显着小于最初的5％时间点。结论：EMG和MMG信号变化的时程在CP-10％和CP + 10％处是不同的，但是观察到的响应表明对疲劳程度的骑行自行车运动依赖于相似的运动单元激活策略。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号