RESUMO
Variations in lower limb structure can cause movement dysfunction and gait impairment. Since, pescavus and planus are common disorders of the foot; we decided to compare the electromyography of the leg muscles of men with pesplanus and pescavus during gait by using forceplate and EMG. In this semi-experimental study, 30 subjects were assigned randomly to pescavus, planus and rectus groups. Five forward walking trials were recorded for each subject [measured by forceplates embedded in the walkway]. We used matlab and SPSS software for data analysis. P=0.05 was considered significant. To compare the variables between the groups, we used one-way ANOVA and Tukey post-hoc tests. EMG activities of the soleus and gastrocnemius muscles in stance phase between the 3 groups did not show any significant differences [P>0.05], but the activity of the fibularislongus muscle during the first double stance and second double stance showed significant differences between the groups[P<0.05]. Also, we found significant differences between the groups in relation to the activity of the tibialis anterior muscle during the whole stance phase [P<0.05]. The changes in the normal structure of the foot might affect the function of the muscles during daily and sport activities that can cause changes in the pattern of injuries. This study can help better organization of the rehabilitation programs and activities for those with abnormal foot types