Sport and Health Research Center, Physical Education Department, Tongji University, Shanghai, 200092, China.
Yangzhi Rehabilitation Hospital, Tongji University School of Medicine, Shanghai, 201619, China.
Med Biol Eng Comput. 2019 Nov;57(11):2407-2415. doi: 10.1007/s11517-019-02040-8. Epub 2019 Aug 31.
Previous studies have suggested that skilled athletes may show a specific muscle activation pattern with a lower antagonist coactivation level. Based on the point, we hypothesize that the coupling of antagonistic muscles may be different between badminton players and non-skilled individuals during exercises. The current work was designed to verify the hypothesis. Ten male college students and eight male badminton players performed three maximal voluntary isometric contractions (MVC) and a set of three maximal concentric ankle dorsiflexion and plantar flexions at an angular velocity of 30°, 60°, 120°, and 180°/s. Surface electromyography (EMG) was recorded from the tibialis anterior (TA) and lateral gastrocnemius (LG) muscles during the test. Normalized average EMG amplitude and phase synchronization index (PSI) between surface EMG of TA and LG were calculated. Antagonist muscle coactivation was significantly lower (from 22.1% ± 9.4 and 10.7% ± 3.7 at 30°/s to 22.4% ± 9.7 and 10.6% ± 2.5 at 180°/s for non-players and badminton players group, respectively), and PSI in beta frequency band was significantly higher (from 0.42 ± 0.06 and 0.47 ± 0.15 at 30°/s to 0.35 ± 0.12 and 0.49 ± 0.14 at 180°/s) in the badminton player group compared with the non-player group during isokinetic ankle dorsiflexion contraction. No significant difference was found in antagonist muscle coactivation and PSI between two group subjects during ankle plantar flexion. The decrease of antagonist coactivation may indicate an optimal motor control style to increase the contraction efficiency, while the increase coupling of antagonistic muscles may help to ensure joint stability to compensate for the decrease of antagonist coactivation. Graphical abstract Significant difference of observed indexes between non-players and badminton players.
先前的研究表明，技术熟练的运动员在进行运动时可能会表现出一种特定的肌肉激活模式，伴较低的拮抗肌共同激活水平。基于这一点，我们假设在运动过程中，羽毛球运动员和非技术个体的拮抗肌之间的耦合可能存在差异。本研究旨在验证这一假设。10 名男性大学生和 8 名男性羽毛球运动员分别进行了 3 次最大等长随意收缩（MVC）和 1 组 3 次最大角速度为 30°、60°、120°和 180°/s 的向心性踝关节背屈和跖屈收缩。在测试过程中，从胫骨前肌（TA）和外侧腓肠肌（LG）表面记录肌电图（EMG）。计算 TA 和 LG 表面肌电图的归一化平均 EMG 幅度和相位同步指数（PSI）。与非运动员组相比，在向心性踝关节背屈收缩时，拮抗肌共同激活显著降低（从 30°/s 时的 22.1%±9.4%和 10.7%±3.7%降至 180°/s 时的 22.4%±9.7%和 10.6%±2.5%），β频带的 PSI 显著升高（从 30°/s 时的 0.42±0.06 和 0.47±0.15 增至 180°/s 时的 0.35±0.12 和 0.49±0.14），而在向心性踝关节跖屈收缩时，两组之间的拮抗肌共同激活和 PSI 没有显著差异。
