China Table Tennis College, Shanghai University of Sport, Shanghai 200438, China.
Shanghai Key Laboratory of Intelligent Manufacturing and Robotics, Shanghai University, Shanghai 200444, China.
Sensors (Basel). 2024 Oct 10;24(20):6521. doi: 10.3390/s24206521.
Fatigue specifically affects the force production capacity of the working muscle, leading to a decline in athletes' performance. This study investigated the impact of fatigue on ankle flexor muscle activity and ground reaction forces (GRFs) in elite table tennis players, with a focus on the implications for performance and injury risk. Twelve elite male table tennis athletes participated in this study, undergoing a fatigue protocol that simulated intense gameplay conditions. Muscle activity of the soleus (SOL) and gastrocnemius lateralis (GL) muscles, heel height, and GRFs were measured using a combination of wireless electromyography (EMG), motion capture, and force plate systems. Results showed a significant decrease in muscle activity in both legs post-fatigue, with a more pronounced decline in the right leg. This decrease in muscle activity negatively affected ankle joint flexibility, limiting heel lift-off. Interestingly, the maximal anteroposterior GRF generated by the left leg increased in the post-fatigue phase, suggesting the use of compensatory strategies to maintain balance and performance. These findings underscore the importance of managing fatigue, addressing muscle imbalances, and improving ankle flexibility and strength to optimize performance and reduce the risk of injuries.
疲劳会特别影响工作肌肉的力量产生能力，导致运动员表现下降。本研究旨在探讨疲劳对优秀乒乓球运动员踝关节屈肌活动和地面反作用力（GRF）的影响，重点关注其对运动表现和受伤风险的影响。12 名优秀男性乒乓球运动员参与了本研究，他们经历了一个模拟高强度比赛条件的疲劳方案。使用无线肌电图（EMG）、运动捕捉和力量板系统测量了比目鱼肌（SOL）和腓肠肌外侧（GL）肌肉的肌肉活动、脚跟高度和 GRF。结果显示，疲劳后双腿的肌肉活动均显著下降，右腿下降更为明显。这种肌肉活动的减少会对踝关节的灵活性产生负面影响，限制脚跟离地。有趣的是，左腿产生的最大前后向 GRF 在疲劳后阶段增加，表明使用了补偿策略来维持平衡和运动表现。这些发现强调了管理疲劳、解决肌肉不平衡以及提高踝关节灵活性和力量的重要性，以优化运动表现并降低受伤风险。
