Medio-lateral and lateral edge friction in indoor sports shoes

It has previously been speculated that the occurrence and severity of lateral ankle sprain injuries is linked to excessive shoe–surface friction. Especially, the lateral parts of the shoe outsole are suggested to play an important role in such scenarios but have never been quantified in a systematic manner. Therefore, the purpose of this study was to investigate the variation of friction of indoor sport shoes with foot orientation and compare it to the traditional industry forefoot friction test standard. We modified the ISO:13287:2019 test for footwear slip resistance and positioned the shoe on its forefoot and lateral edge while replicating medio-lateral movements similar to previously reported ankle sprain incidents. All tests were conducted on an indoor vinyl/sport surface. The results from the modified setups were compared to those following the anterior-posterior orientated ISO standard. Medio-lateral friction was on average 17% lower and lateral edge friction 24% lower than anterior-posterior forefoot friction (p

先前已有推测认为，侧踝扭伤的发生及严重程度与鞋面摩擦力的过度相关。特别是，鞋底外侧部分在此类情况下被认为扮演着重要的角色，但其影响却从未以系统化的方式进行量化。因此，本研究旨在探究室内运动鞋与足部朝向相关的摩擦力变化，并将其与传统行业前足摩擦测试标准进行比较。我们对ISO:13287:2019鞋类防滑测试方法进行了改良，将鞋置于前足和外侧边缘位置，并模拟了与先前报道的踝扭伤事件相似的内外侧运动。所有测试均在室内乙烯基/运动表面上进行。改良设置下的测试结果与遵循前后方向定位的ISO标准的结果进行了比较。结果显示，内外侧摩擦力平均降低了17%，外侧边缘摩擦力降低了24%（p