Tong Jianhua, Lu Zhenghui, Cen Xuanzhen, Chen Chaoyi, Ugbolue Ukadike Chris, Gu Yaodong
Faculty of Sports Science, Ningbo University, Ningbo, China.
Doctoral School on Safety and Security Sciences, Obuda University, Budapest, Hungary.
Front Bioeng Biotechnol. 2023 Jan 30;11:1013100. doi: 10.3389/fbioe.2023.1013100. eCollection 2023.
Local muscle fatigue may have an adverse effect on the biomechanics of the lunge movement and athletic performance. This study analyzed the biomechanical indicators of the forward lunge in badminton players before and after fatigue of the ankle dorsiflexors. Using the isometric muscular strength testing system, 15 badminton players underwent an ankle dorsiflexor fatigue test. Before and after the fatigue experiment, five lunges were done in both the forehand forward (FH) and backhand forward (BH) directions, five in each direction. A Vicon motion capture system and an AMTI force measuring station were used to record lower limb kinematic and ground reaction force (GRF). Pre-fatigue and post-fatigue variability were determined using paired-samples t-tests, Wilcoxon signed rank test, and Statistical Non-parametric Mapping (SNPM). The results showed that after fatigue, the peak angle of ankle dorsiflexion was significantly reduced ( = 0.034), the range of motion (ROM) of the ankle sagittal plane ( = 0.000) and peak angle of ankle plantarflexion ( = 0.001) was significantly increased after forehand landing. After fatigue, ankle inversion was significantly increased after forehand and backhand landings (FH: = 0.033; BH: = 0.015). After fatigue, peak knee flexion angles increased significantly (FH: Max: = 0.000, Min: = 0.000; BH: Max: = 0.017, Min: = 0.037) during forehand and backhand landings and ROM in knee flexion and extension increased ( = 0.009) during forehand landings. Knee inversion range of motion was significantly increased after fatigue ( = 0.024) during forehand landings. Peak hip flexion angle ( = 0.000) and range of motion ( = 0.000) were significantly reduced in forehand landings after fatigue. The mean loading rate ( = 0.005) and the maximum loading rate ( = 0.001) increased significantly during backhand landings after fatigue. Post-fatigue, the center of pressure (COP) frontal offset increased significantly (FH: = 0.000; BH: = 0.000) in the forehand and backhand landings. These results indicate that when the ankle dorsiflexors are fatigued, the performance of the forehand is significantly negatively affected, and the impact force of the backhand is greater.
局部肌肉疲劳可能会对弓步动作的生物力学和运动表现产生不利影响。本研究分析了羽毛球运动员踝背屈肌疲劳前后前弓步的生物力学指标。使用等长肌力测试系统，对15名羽毛球运动员进行了踝背屈肌疲劳测试。在疲劳实验前后，分别在前手向前（FH）和反手向前（BH）方向各进行5次弓步，每个方向5次。使用Vicon运动捕捉系统和AMTI测力台记录下肢运动学和地面反作用力（GRF）。采用配对样本t检验、Wilcoxon符号秩检验和统计非参数映射（SNPM）来确定疲劳前和疲劳后的变异性。结果表明，疲劳后，踝背屈的峰值角度显著减小（ = 0.034），前手落地后踝矢状面的运动范围（ROM）（ = 0.000）和踝跖屈的峰值角度（ = 0.001）显著增加。疲劳后，前手和反手落地后踝内翻显著增加（FH： = 0.033；BH： = 0.015）。疲劳后，前手和反手落地时膝关节屈曲的峰值角度显著增加（FH：最大值： = 0.000，最小值： = 0.000；BH：最大值： = 0.017，最小值： = 0.037），前手落地时膝关节屈伸的ROM增加（ = 0.009）。前手落地时，疲劳后膝关节内翻运动范围显著增加（ = 0.024）。疲劳后前手落地时髋部屈曲的峰值角度（ = 0.000）和运动范围（ = 0.000）显著减小。疲劳后反手落地时平均加载率（ = 0.005）和最大加载率（ = 0.001）显著增加。疲劳后，前手和反手落地时压力中心（COP）在额状面的偏移显著增加（FH： = 0.000；BH： = 0.000）。这些结果表明，当踝背屈肌疲劳时，前手的表现受到显著负面影响，反手的冲击力更大。
