Li Jun, Wu Kaicheng, Ye Dongqiang, Deng Liqin, Wang Jichao, Fu Weijie
School of Exercise and Health, Shanghai University of Sport, Shanghai 200438, China.
School of Health and Nursing, Wuxi Taihu University, Wuxi 214000, China.
Bioengineering (Basel). 2023 Oct 2;10(10):1154. doi: 10.3390/bioengineering10101154.
To explore the difference in the biomechanics of the lower extremity during alternating jump rope skipping (AJRS) under barefoot and shod conditions.
Fourteen experienced AJRS participants were randomly assigned to wear jump rope shoes or be barefoot (BF) during the AJRS at a self-selected speed. The Qualisys motion capture system and Kistler force platform were used to synchronously collect the ground reaction forces and trajectory data of the hip, knee, ankle, and metatarsophalangeal (MTP) joints. One-dimensional statistical parameter mapping was used to analyze the kinematics and kinetics of the lower extremity under both conditions using paired t-tests.
Wearing shoes resulted in a significant decrease in the ROM ( < 0.001) and peak angular velocity ( < 0.001) of the MTP joint during the landing phase. In addition, the MTP joint power ( < 0.001) was significantly larger under shod condition at 92-100% of the landing phase. Moreover, wearing shoes reduced the peak loading rate ( = 0.002).
The findings suggest that wearing shoes during AJRS could provide better propulsion during push-off by increasing the MTP plantarflexion joint power. In addition, our results emphasize the significance of the ankle and MTP joint by controlling the ankle and MTP joint angle.
探讨在交替跳绳（AJRS）过程中，赤足和穿鞋条件下下肢生物力学的差异。
14名有经验的AJRS参与者被随机分配在以自定速度进行AJRS时穿跳绳鞋或赤足（BF）。使用Qualisys运动捕捉系统和奇石乐测力平台同步收集地面反作用力以及髋、膝、踝和跖趾（MTP）关节的轨迹数据。采用一维统计参数映射，通过配对t检验分析两种条件下下肢的运动学和动力学。
穿鞋导致在着地阶段MTP关节的活动范围（<0.001）和峰值角速度（<0.001）显著降低。此外，在着地阶段92%-100%时，穿鞋条件下MTP关节功率（<0.001）显著更大。而且，穿鞋降低了峰值负荷率（=0.002）。
研究结果表明，在AJRS过程中穿鞋可通过增加MTP跖屈关节功率在蹬离阶段提供更好的推进力。此外，我们的结果强调了通过控制踝关节和MTP关节角度，踝关节和MTP关节的重要性。
