Law James C L, Wong Thomson W L, Chan Debbie C L, Lam Wing-Kai
1 Li Ning Sports Science Research Center, Beijing, China.
2 School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
Percept Mot Skills. 2018 Aug;125(4):682-695. doi: 10.1177/0031512518783456. Epub 2018 Jun 21.
Visual illusions caused by varied orientations of visual patterns may influence the perception of space and size, possibly affecting body stability during locomotion. This study examined the effect of variations in shoe top visual patterns on perception and biomechanical stability while walking and running. Twenty healthy adults performed five walking and running trials along an instrumented walkway when wearing shoes with five different striped patterns (plain, vertical, outward, horizontal, and inward). Before these locomotion trials, participants ranked their perceptions of shoe width. We used synchronized force platform and motion capturing systems to measure ground reaction force, mediolateral center of position displacement, ankle inversion and eversion, ankle excursion, and maximum eversion velocity. We rated stability perception on a 150-mm visual analog scale immediately after each shoe condition. Data analyses indicated that participants perceived plain and horizontal striped shoes as significantly wider than inward and vertical patterned shoes. During walking, participants wearing shoes with plain and horizontal striped patterns demonstrated smaller mediolateral center of position displacement, maximum eversion velocity, and ankle range of motion when compared with walking when wearing outward and vertical striped patterns; when running, we observed a similar effect for maximum eversion velocity. Thus, certain visual patterns on the tops of shoes influence the wearers' width perception and locomotion in ways that affect ankle stability during walking and running, with implications for risk of injury.
由视觉图案的不同方向引起的视觉错觉可能会影响空间和大小的感知，进而可能影响运动过程中的身体稳定性。本研究考察了鞋面上视觉图案的变化对行走和跑步时感知及生物力学稳定性的影响。20名健康成年人穿着带有五种不同条纹图案（纯色、垂直、向外、水平和向内）的鞋子，沿着一条装有仪器的通道进行了五次行走和跑步试验。在这些运动试验之前，参与者对他们对鞋子宽度的感知进行了排序。我们使用同步测力平台和运动捕捉系统来测量地面反作用力、位置位移的中外侧中心、踝关节内翻和外翻、踝关节活动范围以及最大外翻速度。在每种鞋子条件后，我们立即在150毫米视觉模拟量表上对稳定性感知进行评分。数据分析表明，参与者认为纯色和水平条纹的鞋子比向内和垂直图案的鞋子明显更宽。在行走过程中，与穿着向外和垂直条纹图案的鞋子行走相比，穿着纯色和水平条纹图案鞋子的参与者表现出更小的位置位移中外侧中心、最大外翻速度和踝关节活动范围；在跑步时，我们观察到最大外翻速度有类似的效果。因此，鞋面上的某些视觉图案会以影响行走和跑步时踝关节稳定性的方式影响穿着者的宽度感知和运动，这对受伤风险有影响。
