Revistes Catalanes amb Accés Obert (RACO)

Comparison of selected muscular activity of trunk and lower extremities in young women's walking on supinated, pronated and normal foot

Hamideh Khodaveisi, Haydar Sadeghi, Raghad Memar, Mehrdad Anbarian



Changes in anatomical structure of the foot reduce the foot ability for normal performance. This study aimed to compare selected muscles of trunk and lower extremities during walking in individuals with different foot types. Forty-five female students were categorized into three groups depending on their foot structures namely, pronated, supinated and normal feet. Foot types defined by foot posture index and X-ray under the specialist physician. Electromyography activities were recorded from muscles of tibialis anterior, peroneus longus, medial gastrocnemius, biceps femoris, gluteus medius, external oblique and erector spinae in three groups while walking in determined path with self-selected gait speed. Each effort simultaneous with electromyography registration was recorded with camera. One-way ANOVA test was used to compare the groups at significance level of 0.05. The activity of muscle of tibialis anterior and medial gastrocnemius was greater in pronated foot group than that in supinated and normal groups during heel contact phase of gait (p = 0.001). Supinated foot group exhibited a greater peroneus longus activation than the other groups (p = 0.001). No significant differences were observed for remaining four muscles (p > 0.05). During midstance phase, peroneus longus, supinated foot group exhibited a greater activity compared to other groups while pronated foot group exhibited a greater muscle activity for gluteus medius than others (p = 0.001). There was a significant difference between normal and pronated foot groups for external oblique (p = 0.001). Regarding the findings of this study, the muscular performance changes in pronated and supinated foot groups are more noticeable than that in normal foot type.

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