【摘要】 目的 探究鞋底磨损对跑步着地冲击阶段后跟-足踝区域内在力学响应特征的影响，为跑鞋使用策略优化和运动损伤预防提供理论依据。方法 通过三维逆向还原技术构建足-跑鞋模型，并基于鞋具磨损参数(磨损长度、宽度及厚度)建立轻中度磨损跑鞋(moderately worn shoe, MWS)模型。通过量化定义模型的生物力学边界与加载条件，对比分析MWS与未磨损跑鞋(CON)在不同足内翻角度(0°, 10°, 20°)工况下的足跟压力特征和胫骨下关节面应力响应规律。结果 在足中立位(0°)时，MWS0组足跟压力峰值较CON0组显著增加20.38%,胫骨内侧平台应力峰值升高28.03%;而在10°足内翻状态下，MWS10组足跟压力峰值较CON10组降低8.38%,胫骨下关节面应力峰值减少22.25%。当足内翻角度为20°时，MWS20组的力学指标虽仍低于对照组，但较MWS10组已出现回升趋势。结论 跑鞋磨损导致的鞋底局部材料硬度增加、厚度减小及支撑面结构完整性破坏会加剧后跟足踝负荷，但适度足内翻状态下磨损跑鞋可通过形成更大的侧向支撑面优化力学传导。本研究创新性地采用参数化方法模拟真实跑鞋磨损模式，研究结果为理解跑鞋磨损与运动损伤的关系提供了参考。更多还原

【Abstract】 Objective To investigate the effects of running shoe wear on the internal biomechanics of the heel-ankle complex during the running impact phase, with the goal of providing a theoretical basis for optimizing shoe usage strategies and preventing sports injuries. Methods A foot-shoe finite element model was developed using three-dimensional(3D) reverse engineering techniques. A moderately worn shoe(MWS) model was constructed based on standardized wear parameters(length, width, and thickness). Biomechanical boundary conditions and loading parameters were quantitatively defined to compare plantar pressure distributions and stress patterns on the inferior surface of the tibia between MWS and unworn shoes(CON) across varying foot inversion angles(0°, 10°, 20°). Results In the neutral position(0°), the MWS0 group exhibited a 20.38% increase in peak plantar pressure and a 28.03% rise in peak stress on the medial tibial plateau compared to the CON0 group. At 10° foot inversion, the MWS10 group showed an 8.38% lower peak plantar pressure and a 22.25% reduction in peak stress relative to the CON10 group. At 20° foot inversion, although the mechanical parameter values of the MWS20 group remained lower than those of the CON20 group, a rebound trend was observed compared to the MWS10 group. Conclusions Shoe wear exacerbates internal biomechanical loading on the heel-ankle complex due to localized material hardening, reduced sole thickness, and a less stable contact base. However, moderate foot inversion in worn shoes may enhance load transfer by creating a relatively flatter and broader contact area. These findings provide deeper insights into the relationship between shoe wear and sports injuries.更多还原