Wrobel James S, Edgar Sarah, Cozzetto Dana, Maskill James, Peterson Paul, Najafi Bijan
Center for Lower Extremity Ambulatory Research, William M. Scholl College of Podiatric Medicine at Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064, USA.
J Am Podiatr Med Assoc. 2010 Jul-Aug;100(4):242-50. doi: 10.7547/1000242.
This pilot study examined the effect of custom and prefabricated foot orthoses on self-selected walking speed, walking speed variability, and dynamic balance in the mediolateral direction.
The gait of four healthy participants was analyzed with a body-worn sensor system across a distance of at least 30 m outside of the gait laboratory. Participants walked at their habitual speed in four conditions: barefoot, regular shoes, prefabricated foot orthoses, and custom foot orthoses.
In the custom foot orthoses condition, gait speed was improved on average 13.5% over the barefoot condition and 9.8% over the regular shoe condition. The mediolateral range of motion of center of mass was reduced 55% and 56% compared with the shoes alone and prefabricated foot orthoses conditions, respectively. This may suggest better gait efficiency and lower energy cost with custom foot orthoses. This tendency remained after normalizing center of mass by gait speed, suggesting that irrespective of gait speed, custom foot orthoses improve center of mass motion in the mediolateral direction compared with other footwear conditions. Gait intercycle variability, measured by intercycle coefficient of variation of gait speed, was decreased on average by 25% and 19% compared with the barefoot and shoes-alone conditions, respectively. The decrease in gait unsteadiness after wearing custom foot orthoses may suggest improved proprioception from the increased contact area of custom foot orthoses versus the barefoot condition.
These findings may open new avenues for objective assessment of the impact of prescribed footwear on dynamic balance and spatiotemporal parameters of gait and assess gait adaptation after use of custom foot orthoses.
这项初步研究考察了定制式和预制式足部矫形器对自我选择的步行速度、步行速度变异性以及在内外侧方向上的动态平衡的影响。
使用穿戴式传感器系统在步态实验室外至少30米的距离内分析了四名健康参与者的步态。参与者在四种条件下以其习惯速度行走：赤脚、穿普通鞋子、穿预制足部矫形器和穿定制足部矫形器。
在穿定制足部矫形器的条件下，与赤脚条件相比，步态速度平均提高了13.5%，与穿普通鞋子的条件相比提高了9.8%。与仅穿鞋子和预制足部矫形器的条件相比，质心的内外侧运动范围分别减少了55%和56%。这可能表明定制足部矫形器具有更好的步态效率和更低的能量消耗。在通过步态速度对质心进行归一化后，这种趋势仍然存在，这表明无论步态速度如何，与其他鞋类条件相比，定制足部矫形器可改善质心在内外侧方向上的运动。通过步态速度的周期间变异系数测量的步态周期间变异性，与赤脚和仅穿鞋子的条件相比，分别平均降低了25%和19%。穿定制足部矫形器后步态不稳定性的降低可能表明，与赤脚条件相比，定制足部矫形器增加的接触面积改善了本体感觉。
这些发现可能为客观评估规定鞋类对动态平衡和步态时空参数的影响以及评估使用定制足部矫形器后的步态适应性开辟新途径。
