摘要
采用ISOMED2000等速测力系统、ME6000无线肌电遥测系统,同步测试优秀跳跃运动员膝关节屈伸肌群在不同速度向心收缩过程中肌肉组织的力学及肌电活动特性。发现,跳跃运动员膝关节屈伸肌群在60°/s、180°/s、300°/s向心用力时力矩、功随着速度增加逐渐下降,而功率随速度增大而增加(P<0.01)。sEMG显示,伸肌和屈肌均被最大程度地动员,且伸肌肌电各参数普遍高于屈肌。iEMG随速度增加而下降,RMS、MF和MPF均随运动速度增加而增加。力矩—功率关系以及功率—iEMG关系的相关性分析表明,在快速运动时,功率与力矩呈不显著性相关(P>0.05),而与iEMG呈高度相关(P<0.01)。等速测试与肌电结合可作为监测与评价运动员膝关节神经肌肉交互活动的有效方法。
ISOMED2000 Isokinetic Force-measuring System and ME6000sEMG Testing System were applied to synchronously measuring the features of mechanics and muscular-electricity action of muscular tissue of jumping elite＇ s knee flexor and extensor groups in the process of concentric contraction at different speed. It found that when jumpers＇ knee flexor and extensor groups made concentric exertion at the speed of 60 °/s, 180 °/s, 360 °/s, the torque and work decreased but the power increased with the increment of speed. The sEMG indicated all the flexors and extensors were activated to the greatest extend and all the sEMG parameters of extensors were higher than those of flexors; iEMG decreased with the increment of speed, while RMS, MF and MPF increased with the acceleration of motion. The results of correlative analysis of the relation between torque and power and between power and iEMG indicate that power shows no significant corrdation with torque, but has a high-degree correlation with iEMG when muscles work at a high speed. It can be used as an effective method of supervising and evaluating athletes＇ knee neuromuscular mutual action to combine isokinetic testing with EMG.
出处
《上海体育学院学报》
CSSCI
北大核心
2008年第1期52-55,78,共5页
Journal of Shanghai University of Sport
基金
教育部博士基金资助项目
