速滑运动员模拟滑板训练时膝关节肌群肌电变化研究

采用ME6000表面肌电仪和SONY高速摄像机对沈阳体育学院9名优秀速度滑冰运动员在模拟滑道训练中进行同步分析。结果表明：速度滑冰运动员侧蹬腿与支撑腿表面肌电原始电压有显著差异,左右伸膝肌群（腓外、腓内）在滑行过程中放电高于其他肌群;左腿为侧蹬腿时,半腱肌在膝关节折叠成小角度时放电最为明显;双支撑阶段右腿屈伸肌群表面肌电标准化电压在膝关节角为110～120°时达到最大值,在膝关节角大于120°之后肌肉力量降低明显。

Knee Muscle EMGChanges in the SpeedSkating Athletes Simulation Skate Training

This study used a the ME6000 surface EMG and two sony high speed camera synchronized analog chute training of Shenyang Institute of Physical nine outstanding speed skater.Athletes need to complete in accordance with the training program on the day of the 300 steps Slippery practice,were divided into three groups of 100 steps,select the left and right legs semitendinosus,rectus femoris,the first six of the lateral gastrocnemius muscle to record its electrical signals.The MegaWin processing software APAS three-dimensional motion analysis system,moving images and surface EMG synchronization analysis to obtain the original voltage,the median frequency（MF）,mean power frequency（MPF）,average EMG（AEMG）,integral muscle electricity（IEMG） and the root mean square（RMS） and other indicators.The results show that： speed skating athletes side kick with the supporting leg surface electromyography original voltage,around the knee extensor muscles（Philippians outside peroneal） taxiing discharge than other muscles;left leg side kick the most obvious;discharge semitendinosus folded into a small angle in the knee right leg flexion and extension of the double support phase the muscles surface electromyography standardization voltage reaches a maximum of 110 ~ 120 ° knee angle,the knee angle greater than 120 ° after the muscle strength decreased significantly.