不同频率局部振动预防人体前臂肌肉疲劳效果及脑电神经网络的机制研究  

Preventive Effect of Local Vibrations at Different Frequencies on Human Forearm Muscle Fatigue and Its Mechanism of EEG Neural Network

作　　者：袁维帅 刘晓丽[2] 柳杨[1] 陈渔 侯雨鑫 鲁盼盼 牛锁青 胡坤 牛茂林 郭峰[1] YUAN Weishuai;LIU Xiaoli;LIU Yang;CHEN Yu;HOU Yuxin;LU Panpan;NIU Suoqing;HU Kun;NIU Maolin;GUO Feng(College of Human Kinesiology,Shenyang Sport University,Shenyang 110102,China;Affiliated Sports School of Shenyang Sport University,Shenyang 110102,China)

机构地区：[1]沈阳体育学院运动人体科学学院,辽宁沈阳110102 [2]沈阳体育学院附属竞技体育学校,辽宁沈阳110102

出　　处：《体育科学》2022年第6期54-66,87,共14页China Sport Science

基　　金：国家自然科学基金资助项目(31701043);辽宁省教育厅科学研究项目(LQN2019ST02);辽宁省高等学校创新团队项目(WT2019005)。

摘　　要：目的:探究不同频率局部振动对预防前臂肌肉疲劳的效果及其脑电神经网络机制。方法:选取16名健康成年大学生作为受试者,在诱发前臂肌肉疲劳前对其右前臂屈指肌肌腱实施3种频率(60、30和0 Hz)的局部振动,将60、30 Hz振动作为实验组,0 Hz振动作为空白对照组;分别记录受试者在振动刺激干预前后最大随意收缩力(maximumvoluntarycontraction,MVC)和屈指肌持续收缩至疲劳过程中的肌电、握力、主观体力等级感觉以及振动后即刻静息状态下的脑电。结果:(1)在3种振动刺激下,肌肉收缩至疲劳的时间分别为(154.5±42.9)s(0 Hz)、(187.3±60.0)s(30 Hz)和(226.5±65.1)s(60 Hz),组间差异具有统计学意义(P<0.0001),且60 Hz振动>30 Hz振动>0 Hz振动(P<0.05)。(2)肌肉疲劳过程中握力样本熵分别为1.62±0.33(0 Hz)、1.60±0.53(30 Hz)和1.31±0.40(60 Hz),组间差异有统计学意义(P<0.05),其中,60 Hz振动<0 Hz振动(P<0.05)、60 Hz振动<30 Hz振动(P<0.05)。(3)肌肉疲劳过程中前臂屈指肌标准化肌电幅值RMS(%)分别为37.2%±14.4%(0 Hz)、54.0%±22.9%(30 Hz)和43.5%±20.0%(60 Hz),组间差异具有统计学意义(P<0.05),其中,30 Hz振动>0 Hz振动(P<0.05)。(4)不同频率振动刺激后即刻静息态时,受试者运动对侧大脑半球中央区与顶区之间的脑功能连接在脑电β3波段存在统计学差异(P<0.05),且60 Hz振动>0 Hz振动(P<0.05);运动对侧大脑半球中央区与同侧大脑前额区在脑电β3波段的脑功能连接也存在统计学差异(P<0.05),其中60 Hz振动>30 Hz振动(P<0.05);运动对侧大脑半球的中央区(P<0.05)和顶区(P<0.05)的区域内脑功能连接在脑电α波段上存在统计学差异,均表现为30 Hz振动>0 Hz振动(P<0.05)。结论:在运动前对肌肉实施60 Hz或30 Hz局部振动刺激,可以有效预防低负荷静态收缩诱发的运动性肌肉疲劳,但效果存在差异,其原因可能与不同振动频率引起运动神经元募集和大脑运动皮质区与感觉皮�Objective:To explore the effect of local vibrations at different frequencies on the prevention of forearm muscles fatigue and its mechanism of EEG neural network.Methods:16 healthy adults were recruited in this study,local vibration(LV)with three frequencies(60,30,0 Hz)was performed on the flexor tendons of the subjects’right forearm before muscle fatigue.The 60 Hz and 30 Hz were set as the experimental groups,and the 0 Hz was the control group.The maximal voluntary contraction(MVC)force at before and after vibration stimulation,the electromyography(EMG),grip strength and rating of perceived exertion(RPE)during the fatiguing task and electroencephalography(EEG)during resting state immediately after vibration were recorded.Results:The time of muscle fatigue was(154.5±42.9)s(0 Hz),(187.3±60.0)s(30 Hz),and(226.5±65.1)s(60 Hz),respectively,differences between groups were significant with 60 Hz LV>30 Hz LV>0 Hz LV(P<0.05).The sample entropy(SE)of grip strength was 1.62±0.33(0 Hz),1.60±0.53(30 Hz),and 1.31±0.40(60 Hz),respectively,differences between groups were significant(P<0.05),i.e.,60 Hz LV<30 Hz LV(P<0.05)and 60 Hz LV<0 Hz LV(P<0.05).The normalized RMS(%)of EMG of forearm flexor muscle was 37.2%±14.4%(0 Hz),54.0%±22.9%(30 Hz),and 43.5%±20.0%(60 Hz),respectively,differences between groups were significant with 30 Hz>0 Hz(P<0.05).After LV,the functional brain connectivity between the contralateral hemisphere central and parietal regions in theβ3 band showed significant difference(P<0.05)with 60 Hz LV>0 Hz LV(P<0.05),and the functional brain connectivity between the contralateral hemisphere central and ipsilateral hemisphere frontal regions in theβ3 band showed significant difference(P<0.05)with 60 Hz LV>30 Hz LV.Significant differences were also found in the functional brain connectivity of contralateral hemisphere central and parietal regions in the alpha band(P<0.05)with 30 Hz LV>0 Hz LV.Conclusions:Conducting 60 Hz or 30 Hz local vibrations on the forearm flexor muscle before exercise can effectivel

关 键 词：前臂肌肉 筋膜枪 振动刺激 疲劳 脑电 神经网络 

分 类 号：G804.6[文化科学—运动人体科学]