The purpose of this study was to explore the immediate effects of running speed and midsole type on foot loading during heel–toe running. Fifteen healthy male college students were required to complete 3 running trials on an indoor 45-m tartan runway at 4 different speeds (3, 4, 5, and 6 m/s) using 2 different running footwear types (engineering thermoplastic polyurethane elastomer, polyurethane elastomer; and ethylene vinyl acetate, vinyl acetate). The ground reaction force and plantar pressure data were quantified. Significant speed effects were detected both in ground reaction force and plantar pressure-related data (P < .05). Vertical average loading rate was significantly less, and time to first peak occurred later for the polyurethane elastomer compared with vinyl acetate footwear (P < .05). The peak pressure of the heel, medial forefoot, central forefoot, lateral forefoot, and big toe was significantly less when subjects wore a polyurethane elastomer than vinyl acetate footwear (P < .05). Overall, our results suggested that, compared with the vinyl acetate footwear, the special polyurethane elastomer footwear that is adhered with thousands of polyurethane elastomer granules was effective at reducing the mechanical impact on the foot.

本研究的目的是探讨跑步速度和中底类型对跟趾跑步时足部负荷的直接影响。要求 15 名健康男大学生使用 2 种不同跑鞋类型（工程热塑性聚氨酯弹性体、聚氨酯弹性体；和乙烯醋酸乙烯酯、醋酸乙烯酯）。地面反作用力和足底压力数据被量化。在地面反作用力和足底压力相关数据中均检测到显着的速度影响（P  < .05）。与醋酸乙烯酯鞋类相比，聚氨酯弹性体的垂直平均负载率明显较低，并且达到第一个峰值的时间较晚 ( P  < .05)。当受试者穿着聚氨酯弹性体时，脚跟、前脚内侧、前脚中央、前脚外侧和大脚趾的峰值压力显着低于醋酸乙烯鞋（P  < .05）。总体而言，我们的结果表明，与醋酸乙烯鞋类相比，粘合有数千个聚氨酯弹性体颗粒的特殊聚氨酯弹性体鞋类可有效减少对足部的机械冲击。