Yu Hai-Bin, Tai Wei-Hsun, Li Jing, Zhang Rui, Hao Wei-Ya, Lin Jian-Zhi
School of Physical Education, Quanzhou Normal University, Quanzhou 362000, China.
College of Textiles and Apparel, Quanzhou Normal University, Quanzhou 362000, China.
Healthcare (Basel). 2021 Oct 18;9(10):1394. doi: 10.3390/healthcare9101394.
This study investigated differences in lower extremity muscle activations and vertical stiffness during a 2.2 Hz jump rope exercise with different midsole hardnesses (45, 50, 55, and 60 Shores C). Twelve healthy male participants wore customized shoes with different hardness midsoles and performed jump rope exercises in a random order. A nine-camera motion analysis system (150 Hz), a force platform (1500 Hz), and a wireless electromyography (EMG) system (Noraxon, 1500 Hz) were used to measure the biomechanical parameters during the jump rope exercise. The biceps femoris %MVC of barefoot participants was significantly greater than that of those wearing the 45 Shores C ( = 0.048) and 55 Shores C ( = 0.009) midsole 100 ms before landing. The vastus medialis %MVC of barefoot participants was significantly greater than that of those wearing the 55 C midsole ( = 0.005). Nonsignificant differences in vertical stiffness were found between midsole hardnesses and barefoot. Lower extremity muscle activation differed between conditions. The results of this study indicate that for repetitive activities that entail multiple impacts, sports shoes with a low midsole hardness (e.g., 50 Shores C or 45 Shores C) may be appropriate. It is important to provide customers with information regarding midsole hardness in shoe product labeling so that they properly consider the function of the shoes.
本研究调查了在2.2赫兹跳绳运动中，不同中底硬度（45、50、55和60邵氏C）下下肢肌肉激活情况和垂直刚度的差异。12名健康男性参与者穿着带有不同硬度中底的定制鞋子，以随机顺序进行跳绳运动。使用九摄像头运动分析系统（150赫兹）、力平台（1500赫兹）和无线肌电图（EMG）系统（Noraxon，1500赫兹）来测量跳绳运动期间的生物力学参数。在着陆前100毫秒，赤脚参与者的股二头肌%MVC显著高于穿着45邵氏C（P = 0.048）和55邵氏C（P = 0.009）中底的参与者。赤脚参与者的股内侧肌%MVC显著高于穿着55C中底的参与者（P = 0.005）。中底硬度与赤脚状态之间在垂直刚度方面未发现显著差异。不同条件下下肢肌肉激活情况有所不同。本研究结果表明，对于需要多次冲击的重复性活动，中底硬度较低的运动鞋（例如50邵氏C或45邵氏C）可能较为合适。在鞋类产品标签中向消费者提供有关中底硬度的信息非常重要，以便他们正确考虑鞋子的功能。
