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Change of bio-electric interferential currents of acute fatigue and recovery in male sprinters

Sports Medicine and Health Science 2020年第1期2卷 25-32页

作者： Yajun Tan Yang Liu Ruibin Ye Hanxiao Xu Wenliang Nie Jian Lu Bin Zhang Chun Wang Benxiang He Sport Hospital Chengdu Sport UniversityChengduChina School of Physical Education and Sport Training Shanghai University of SportShanghaiChina School of Sport Science Lingnan Normal UniversityZhanjiangChina School of Sports and Health East China Normal UniversityShanghaiChina Department of Orthopedics Sichuan Province Traditional Chinese Medicine HospitalChengduChina School of Sport Medicine and Health Chengdu Sport UniversityChengduChina

We studied the muscle fatigue and recovery of thirty male sprinters(aged 18–22 years)using the Frequency Analysis Method(FAM).The interferential currents(ICs)with different thresholds for sensory,motor and pain responses,the maximal voluntary contraction(MVC),and the amplitude of the surface EMG(aEMG,sEMG)were assessed prior to and immediately after an acute explosive fatigue training session,and during one-week *** found that IC increased on average from 32.38.9 mA to 37.57.5 mA in sensory response at 10 Hz immediately post training(p=0.004)but decreased at 24-hr post training(p=0.008)and returned to pre-levels *** and pain response patterns at 10 Hz were similar(motor:p=0.033 and 0.040;pain:p=0.022 and 0.019,respectively).The change patterns of ICs were similar to but prior to the changes of *** agreement between IC assessment and amplitude of sEMG(aEMG)/MVC ratio was good(>95%).The present study suggested that the changes in ICs were prior to the changes in both the aEMG and force during *** changes may reflect the physiological sensory change due to peripheral *** may be useful as an effective early detection and simple tool for monitoring muscle fatigue during training and recovery in athletes.

关键词： Fatigue Frequency analysis method Interferential current maximal voluntary contraction Surface electromyogram

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