北欧腘绳肌训练屈膝肌群的表面肌电特征

Surface EMG Features of Knee Flexor Muscles in Nordic Hamstring Training

目的北欧腘绳肌训练是增强腘绳肌力量、预防腘绳肌损伤和复发的常用手段,本研究将着重分析屈膝肌群在北欧腘绳肌训练中的表面肌电特征。方法招募9名男大学生作为受试者,运用红外高速光学运动捕捉系统和表面肌电测试仪同步测试实验,测取受试者北欧腘绳肌训练动作过程中的运动学、肌电学数据并处理分析。结果在进行北欧腘绳肌训练动作中,股二头肌、半腱肌、腓肠肌(内、外侧头)、比目鱼肌的肌电变化趋势呈现较高一致性,半腱肌最先激活,腓肠肌(外侧头)激活程度最高。结论在北欧腘绳肌训练动作中,小腿三头肌与腘绳肌肌电变化趋势相近,屈膝肌群在动作运动控制中存在一定协作关系。腓肠肌作为远端双关节肌,在动作过程中能够向近端关节肌肉传递力量、分担内部力矩,配合腘绳肌稳定膝关节,增强运动中的平衡控制。

Objective Nordic hamstring training is a common method to enhance hamstring strength and prevent hamstring injury and recurrence.This study will focus on analyzing the surface electromyography characteristics of knee flexors during Nordic hamstring training.Methods 9 male college students were recruited as subjects,and the infrared high-speed optical motion capture system and surface electromyography tester were used to test the experiment synchronously.Process analysis.Results During the Nordic hamstring training,the electromyography changes of biceps femoris,semitendinosus,gastrocnemius(medial and lateral heads),and soleus showed a high consistency,semitendinosus was activated first,and gastrocnemius was activated first.(lateral head)had the highest degree of activation.Conclusion During the Nordic hamstring training,the electromyography changes of the triceps and hamstrings are similar,and the knee flexors have a certain cooperative relationship in motor control.The gastrocnemius,as a distal double-joint muscle,can transmit force to the proximal joint muscles and share the internal torque during the movement,cooperate with the hamstrings to stabilize the knee joint,and enhance the balance control during exercise.