有氧运动对钝挫伤恢复期大鼠腓肠肌肌电变化影响的实验研究  

An experimental study on the effect of aerobic exercise on electromyographic changes of gastrocnemius muscle in rats during the recovery of contusion

作　　者：郁建华 孔纯纯 张英祥 潘卫东[3] 李可峰[2] 董贵俊[2] YU Jian-hua;KONG Chun-chun;ZHANG Ying-xiang;PAN Wei-dong;LI Ke-feng;DONG Gui-jun(Department of Physical Education,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;College of Sports and Health,Shandong Sport University,Jinan 250102,China;Department of Bio-electromagnetic Technology Research,Institute of Electrical Engineering of Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]南京航空航天大学体育部,江苏南京210016 [2]山东体育学院运动与健康学院,山东济南250102 [3]中国科学院电工研究所生物电磁技术研究部,北京100190

出　　处：《体育学刊》2021年第5期138-144,共7页Journal of Physical Education

基　　金：山东省自然科学基金(ZR2017LC012)。

摘　　要：对腓肠肌钝挫伤后大鼠恢复过程施加有氧运动进行恢复干预,通过分析肌电变化情况,探讨施加有氧运动对钝挫伤腓肠肌恢复的影响。60只雄性SD大鼠随机分为5组:正常对照组(A组)、自然恢复组(B组)、伤后48 h有氧运动组(C组)、伤后7 d恒定负荷有氧运动组(D组)、伤后7 d渐增负荷式有氧运动组(E组)。建模并于钝挫伤后2、5、7、10、14、21、28、30、35、56 d进行肌电图检测,观察大鼠钝挫伤腓肠肌恢复情况,记录静息电位、肌电异常自发活动出现的程度、复合肌肉动作电位(CMAP)的波幅和潜伏期的变化情况。结果显示:(1)自发电位结果:E组自发电位Daube积分分别在21、28、35 d显著低于C组,D组在28 d显著低于C组。(2)CMAP潜伏期比值:E组在14、28、35 d均显著低于B组,在14、21、28、35 d显著低于C组,在35 d显著低于D组。(3)CMAP波幅比值:D组在35、56 d显著高于B组,E组在10、14、28、35、56 d显著高于B组;D组和E组在10、14、21、28、35、56 d均显著高于C组;E组在10、56 d显著高于D组。结果表明:在腓肠肌钝挫伤恢复过程中,伤后48 h施加有氧运动,可加剧诱发大鼠自发电位异常,延长CMAP潜伏期,降低波幅恢复速度,不利于大鼠腓肠肌钝挫伤后的恢复及周围神经发生再支配;7 d后施加递增有氧运动和恒定负荷有氧运动可促进异常自发电位消失,缩短CMAP潜伏期,提高波幅恢复速度,有利于大鼠受损骨骼肌的修复及神经再支配。Aerobic exercise was applied to recovery intervention in the rats after blunt contusion of gastrocnemius muscle during the recovery period,so as to explore the effect of the recovery of gastrocnemius muscle with blunt contusion by conducting aerobic exercise via analyses of electromyographic changes.60 male SD rats were randomly divided into five groups:normal control group(group A),natural recovery group(group B),aerobic exercise group 48h after injury(Group C),constant load aerobic exercise group 7d after injury(Group D),gradually increasing load aerobic exercise group 7d after injury(Group E).The rats were sacrificed at 2d,5d,7d,10d,14d,21d,28d,30d,35d and 56d after blunt contusion,and were tested by electromyography.The recovery of gastrocnemius muscle was observed,the resting potential was recorded and the changes of CMAP were inducted during recovery.Results show that:(1)spontaneous potential:the Daube score of spontaneous potential in Group E was significantly lower than that in group C at 21d,28d and 35d,and that in group D was significantly lower than that in group C on 28d.(2)CMAP latency ratio:the latency of group E was significantly lower than that of group B at 14d,28d and 35d,significantly lower than that of group C at 14d,21d,28d and 35d,and significantly lower than that of group D at 35d.(3)CMAP amplitude ratio:the amplitude of group D was significantly higher than that of group B at 35d and 56d,and that of group E was significantly higher than that of group B at 10d,14d,28d,35d and 56d;the amplitude of group D and E was significantly higher than that of group C at 10 d,14 d,21d,28d,35d and 56d;the amplitude of group E was significantly higher than that of group D at 10 d and 56d.The study indicates that:during the recovery process of gastrocnemius contusion,aerobic exercise 48 hours after injury can aggravate the abnormal spontaneous potential,prolong the latent period of CMAP,and reduce the recovery speed of amplitude,which is not conducive to the recovery of gastrocnemius contusion and reinnerv

关 键 词：运动医学 腓肠肌 钝挫伤 有氧运动 肌电 

分 类 号：G804.5[文化科学—运动人体科学]