Jamali Akram, Forghany Saeed, Bapirzadeh Khadijeh, Nester Christopher
Musculoskeletal Research Centre, School of Rehabilitation Sciences, Isfahan University of Medical Sciences, Isfahan, Iran.
School of Health Sciences, University of Salford, Salford, UK.
Adv Biomed Res. 2019 Jun 28;8:42. doi: 10.4103/abr.abr_69_19. eCollection 2019.
Increased ankle movement variability has been reported in people with functional ankle instability (FAI). The purpose of this study was to investigate the effect of textured insole, lateral wedge, and textured lateral wedge insole on ankle movement variability during walking in athletes with FAI.
Twenty-one athletes diagnosed with FAI participated in this before-after study. Kinematic data were collected during four conditions (5 repeated trials per condition): (1) flat ethylene-vinyl acetate (EVA) insole, (2) textured flat EVA insole, (3) prefabricated lateral heel and sole wedge insole, and (4) textured lateral heel and sole wedge. The analysis of ankle movement variability was conducted during stance phase and 200 ms before initial contact to 200 ms after initial contact. The coefficient of multiple correlations (CMC) was calculated to investigate pattern variability and intraclass correlation (ICC) was used to investigate variability at the points of interest.
In terms of pattern variability, wearing textured lateral wedge increased CMC compared to other insoles. However, statistically significant differences were observed only in the frontal plane during stance phase ( < 0.05). In terms of variability at the points of interest, in the frontal plane and in all points of interest, wearing textured lateral wedge increased ICC compared to other insoles. The effects of other insoles on ankle movement variability were inconsistent.
The results of this study showed that textured insole has the potential to decrease variability and the use of texture with lateral wedge may more improve variability in athletes with FAI.
据报道，功能性踝关节不稳（FAI）患者的踝关节运动变异性增加。本研究的目的是调查纹理鞋垫、外侧楔型鞋垫和带纹理的外侧楔型鞋垫对FAI运动员行走过程中踝关节运动变异性的影响。
21名被诊断为FAI的运动员参与了这项前后对照研究。在四种条件下（每种条件重复测试5次）收集运动学数据：（1）扁平乙烯-醋酸乙烯酯（EVA）鞋垫；（2）带纹理的扁平EVA鞋垫；（3）预制的足跟和鞋底外侧楔型鞋垫；（4）带纹理的足跟和鞋底外侧楔型鞋垫。在站立期以及初始接触前200毫秒至初始接触后200毫秒期间对踝关节运动变异性进行分析。计算多重相关系数（CMC）以研究模式变异性，并使用组内相关系数（ICC）来研究感兴趣点的变异性。
在模式变异性方面，与其他鞋垫相比，穿着带纹理的外侧楔型鞋垫会增加CMC。然而，仅在站立期的额状面观察到统计学显著差异（<0.05）。在感兴趣点的变异性方面，在额状面以及所有感兴趣点，与其他鞋垫相比，穿着带纹理的外侧楔型鞋垫会增加ICC。其他鞋垫对踝关节运动变异性的影响并不一致。
本研究结果表明，纹理鞋垫有可能降低变异性，并且在FAI运动员中，将纹理与外侧楔型相结合使用可能更有助于改善变异性。
