Guangdong Provincial Engineering Technology Research Center for Sports Assistive Devices, Guangzhou Sport University, Guangzhou, China.
Key laboratory of Prosthetics and Orthotics Technology of the Ministry of Civil Affairs, Beijing College of Social Administration, Beijing, China.
J Sports Sci. 2021 Jun;39(12):1386-1394. doi: 10.1080/02640414.2021.1874716. Epub 2021 Jan 17.
This study examined the effects of shear reduction shoes on braking and propulsion ground reaction forces (GRFs), free moments, and joint moments when cutting towards different directions. Fifteen male university basketball players performed sidestep cutting towards 45°, 90° and 135° directions with maximum-effort in shear reduction and control shoes. Two-way (angle x shoe) ANOVAs with repeated measures were performed to determine the interaction and main effects of cutting angle and shoe for all tested variables. Results showed that cutting angles had significant influence on most of the variables, except for the peak-free moment, peak ankle eversion moment and maximum loading rate of resultant shear GRF. The shear reduction shoes significantly delayed the timing to the first peaks of vertical and resultant shear GRFs compared with the control shoes. During propulsion, the shear reduction shoes generated smaller peak propulsion resultant shear and vertical ground reaction forces. Additionally, the shear reduction shoes did not induce distinct frontal and transverse moments at the ankle and knee joints compared with the control shoes. These results suggest that the application of shear reduction structure could be beneficial to attenuate vertical and shear impact peaks, offering additional insights to reduce shear-related injuries.
本研究旨在探讨在向不同方向进行侧身切入时，减少切变鞋对制动和推进地面反作用力（GRF）、自由力矩和关节力矩的影响。15 名男性大学生篮球运动员在穿着减少切变鞋和控制鞋的情况下，以最大努力向 45°、90°和 135°方向进行侧身切入。采用双向（角度 x 鞋）重复测量方差分析来确定切入角度和鞋对所有测试变量的交互作用和主要影响。结果表明，除了峰值自由力矩、峰值踝关节外翻力矩和最大剪切 GRF 加载率外，切入角度对大多数变量都有显著影响。与控制鞋相比，减少切变鞋显著延迟了垂直和剪切合力 GRF 的第一个峰值的出现时间。在推进阶段，减少切变鞋产生的推进峰值剪切和垂直地面反作用力较小。此外，与控制鞋相比，减少切变鞋在踝关节和膝关节处没有产生明显的额状面和横断面上的力矩。这些结果表明，应用剪切减少结构可能有助于减轻垂直和剪切冲击峰值，为减少与剪切相关的损伤提供了更多的见解。
