Role of Mono- and Biarticular Muscles in Explosive Movements
Role of Mono- and Biarticular Muscles in Explosive Movements
复制标题
单关节和双关节肌肉在爆发性运动中的作用
DOI：
--
复制
发表时间：
1984
影响因子：
2.5
通讯作者：
G. V. I. Schenau
中科院分区：
文献类型：
--
作者：
L. Grégoire;H. Veeger;P. Huijing;G. V. I. Schenau
从24个垂直跳跃（8名受试者，每跳3次），计算力，扭矩，每个关节的功率与8条腿肌肉的EMG数据相结合，并估计其收缩速度。在蹬离的第二部分中，在跖屈期间在踝关节中输送3000-4000 W的高功率输出。这归因于从髋关节到膝关节和踝关节的连续能量流。通过双方的协调行动。臀大肌和臀肌股直肌和肌vastus med.，intermedius和later。(mm. vasti）和m.在腓肠肌中，由髋关节和膝关节的单关节伸肌递送的功率经由双关节肌肉向远侧输送到踝关节。在推离结束时的高跖屈速度期间，髋关节和膝关节显示出高伸展速度，导致双关节肌肉的收缩速度相对较低。因此，他们可以提供高的力量，这使他们能够在近远侧方向上传输能量，并使他们能够降低髋关节和膝关节的角速度，而不会因偏心收缩而损失。它的结论是，这种电力运输是必不可少的执行爆炸运动。
From 24 vertical jumps (eight subjects, three jumps each), calculations of forces, torques, and power per joint were combined with EMG data of eight leg muscles and with estimations of their contraction velocities. In the second part of the push-off, a high power output of 3000-4000 W was delivered in the ankle joints during plantar flexion. This is attributed to a sequential energy flow from hip to knee and ankle joints. Through coordinated actions of both the m. gluteus maximus and the m. rectus femoris as well as the m. vastus med., intermedius and lat. (mm. vasti) and the m. gastrocnemius, power delivered by the monoarticular extensors of the hip and knee joints was transported distally via the biarticular muscles to the ankle joints. During the high plantar flexion velocity at the end of the push-off, hip and knee joints showed high extension velocities resulting in relatively low contraction velocities for the biarticular muscles. As a consequence they could deliver high forces, which allowed them to transport energy in a proximodistal direction and allowed them to decelerate the angular velocities of the hip and knee joints without losses due to eccentric contractions. It is concluded that this power transport is essential in the execution of explosive movements.