Comparing the effect of wearing insoles on some motor-physical factors, lower extremity performance and stability in male adolescents with structural flat foot

Document Type : Research Paper


1 Master of Physical Education, Islamic Azad University, Karaj Branch, Karaj, Iran

2 Assistant Professor, Department of Control and Motor Development, Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran

3 Sepehr Heart Center, Baharloo Hospital, Tehran University of Medical Sciences, Tehran


Background: flatfoot is a common deformity characterized by the midfoot arch collapses during walking. As the midfoot is responsible for shock absorption, persons with flatfoot experience increased risk of injuries
Aim: to the purpose of this study was to compare some motor-physical factors, lower extremity performance and stability index in male adolescents 10-12 having structural flat foot with and without insole.
Materials and Methods: Subjects who utilized medical insoles for four to six months were selected in access from technical orthopedic in Karaj. After parents got aware of the purpose and conditions participating in research, their height and weight were measured. In the first day, they were assessed by motor-physical factors test (agility, speed, endurance), lower extremity performance (one-leg jump, cross jump, maximum distance access, walking six meters) and stability index wearing insole and on the next day without wearing insole. To analyze data, paired t-test was utilized. Wilcoxson was used respectively for parametric and non-parametric data.
Results: According to the paired t-test a significant difference was observed in the 6-meter timed test. Mean difference was slower in wearing insole compared to not wearing insole. Moreover, stability index results showed more stability when not wearing insole which eyes were closed to significant.
Conclusion: According to the results, wearing insole in individuals with flat foot, could slow down the walking speed. However, wearing insole may improve stability index when visual input is not in access.