Immediate changes in anticipatory muscle activity after unexpected muscle contraction training
Immediate changes in anticipatory muscle activity after unexpected muscle contraction training
复制标题
意外的肌肉收缩训练后预期肌肉活动立即发生变化
DOI：
10.1002/tsm2.168
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发表时间：
2020
影响因子：
1.2
通讯作者：
Morishita Shinichiro
中科院分区：
文献类型：
--
作者：
Aoki Osamu;Otani Yoshitaka;Morishita Shinichiro
本研究旨在探讨意外躯干肌肉收缩训练对单腿举重任务中预期肌肉活动的影响。共有11名健康成人进行了20次快速单腿抬腿试验，通过弯曲其主腿的髋关节，使大腿与躯干成90°。作为一项训练任务，参与者坐在一块摇臂板上，突然发起一个运动来破坏躯干肌肉的稳定。利用力板和三维运动分析系统确定了运动时间，即从重量偏移开始到质心偏移开始。用肌电图测定多裂肌（MF）、内斜肌（IO）和外斜肌（EO）两侧肌肉活动的开始时间和幅度。结果表明，意外肌肉收缩训练能有效地加速单腿举动作中站立侧IO肌的发作，降低站立侧MF和IO振幅。MF和IO的站立侧在单腿抬起任务中抵消骶髂关节剪切力具有重要作用。因此，我们的结果表明，躯干肌肉训练改善预期肌肉收缩。
This study aimed to investigate the effects of unexpected trunk muscle contraction training for anticipatory muscle activity during a single‐leg lifting task. A total of 11 healthy adults performed 20 trials of rapid single‐leg lifts by flexing the hip joint of their dominant leg so that the thigh was 90° to the torso. As a training task, participants sat on a rocker board and a sudden movement was initiated to destabilize the trunk muscles. A force plate and 3D motion analysis system determined the motion time, which was from the weight shift onset to the center of mass shift onset. An electromyograph was used to determine the muscle activity onset time and amplitude from both sides of multifidus (MF), internal (IO), and external obliques (EO). The results showed that unexpected muscle contraction training was effective to hasten the stance side of IO muscle onset and decrease the stance side of MF and IO amplitude in a single‐leg lifting task. The stance side of MF and IO has an important role in counteracting the sacroiliac joint shear force in the single‐leg lifting task. Hence, our results indicated that the trunk muscle training improved anticipatory muscle contraction.