مقايسه جذب نيروي عمودي عكس العمل زمين بين افراد داراي ناهنجاري پاي چرخيده به داخل و خارج در حركت فرود تك پا

The comparison of Ground Reaction Forces attenuation between supinated and pronated foot during single leg drop-landing

lower extremity structural deviations lead to mechanical deviations that place athletes at increased risk for injury. The purpose of this study was the comparison of peak vertical ground reaction force and rate of loading between supinated, pronated, and normal feet during single leg drop-landing 30 healthy male students from physical education & sport sciences department volunteered in this study. Subjects were assigned to one of three groups by navicular drop test (10 per groups) [pronated (2:10mm), neutral (5-9mm), or supinated (:04mm)]. Subjects performed single leg drop-landing on the force plate from the box with height of 30 Cm. Peak VGRF and ROL calculated using GRF data. To evaluate differences in peak VGRF and ROL between three groups Multivariate analysis of Variance (MANOVA) at the P level of 0.05 used. Significant differences seen between three groups for ROL (F, ,,=15.553, Wilksʹ Lambda ~ 0.370, P:OO.05) but there was not any significant differences between three groups for peak VGRF (F2. 22 ~ 2.632, P >0.05. These results suggest that supinated foot is associated with specific lower extremity kinetics. Differences in these parameters may subsequently lead to differences in injury patterns in supinated and pronated foot in athletes