Document Type : Original Article
Authors
1
Department of Sport Biomechanics, Central Tehran Branch, Islamic Azad University, Tehran, Iran.
2
Department of Sport Biomechanics and Injuries, Faculty of Physical Education and Sports Science, Kharazmi University, Tehran, Iran
3
Department of Sport Biomechanics and Rehabilitation, Kinesiology Research Center, Kharazmi University, Tehran, Iran
10.22038/jpsr.2025.82806.2657
Abstract
Purpose:
Various methods such as exercises, orthotic insoles, and shoes have been recommended to manage flexible flatfoot deformity, however, there are still challenges in determining their superiority. The aim of the present study was to investigate the immediate effects of orthopedic insoles, shoes, and taping on the kinetic variables of athletes with flexible flatfoot during walking.
Methods:
In this semi-experimental study, 15 male athletes aged 18 to 25 years with flexible flatfoot participated. The participants were asked to walk a 10-meter path under different conditions: shoes with insoles, barefoot, shoes with taping, taping, and shoes alone. Ground reaction force data were collected using a force plate. Ground reaction force variables in vertical, anterior-posterior, and medial-lateral directions, as well as the ground reaction force vector, were extracted as force, time, impact, loading rate, and heel-off rate variables. The analysis of variance with repeated measures or the Friedman test was used to compare the research variables at a significance level of p ≤ 0.05 in SPSS version 24.
Results:
The results showed that shoe conditions combined with insoles and taping increased the first vertical peak force and reduced the trough (p<0.05). Barefoot and taping had higher values at the second peak. In the anterior-posterior direction, shoes with insoles demonstrated greater braking force compared to barefoot and taping, but only taping with shoes showed a significant difference in propulsive force (p<0.05). Additionally, the time to reach maximum propulsive force and the peaks of medial-lateral forces differed significantly between conditions (p<0.05). Barefoot and taping had significant differences in vertical and anterior-posterior impact forces, while the shoe condition showed a significant difference in the medial-lateral direction (p<0.05). The loading rate and heel-off rate also showed significant differences (p<0.05).
Conclusion:
The present study showed that shoes with characteristics similar to those in the current study perform better in controlling ground reaction forces, and their application is recommended as suitable footwear for physical activities and potentially sports. Although orthopedic insoles or taping were effective in some aspects, overall, shoes appeared to be more beneficial. The results of the study indicate that selecting the appropriate footwear can improve muscle performance and reduce potential injuries in the lower extremities. It is recommended that future studies focus on the impact of footwear choice on muscle performance. However, it should be noted that this study only examined the effect of shoes on walking, and further research is necessary to generalize these results to sports movements, with a focus on differences between these two conditions.
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