The Effect of Two different Types of Shoes out Soles on the Frequency Content of the Ground Reaction Force Components

The aim of this study was to evaluate the differences in frequency content of the ground reaction force during running with regular shoes (Polyvinyl chloride); the shoes containing Nano shoes in their outsole (Nano shoes) and barefoot. Fifteen physical education active male students (age 24±3 years، height 176±5 cm، and weight 69±8 kg) without injury randomly ran on the force plate placed in a 15 meters runway in Nano shoes، Polyvinyl chloride and barefoot conditions. Fourier transformation of ground reaction force was determined to calculate 99. 5% power frequency، median and bandwidth frequencies. One-way ANOVA test was applied to show differences. Significant reductions were seen in 99. 5% frequency and median frequency of anterior-posterior and vertical ground reaction force during running with Nano shoes and Polyvinyl chloride shoe sole as compared to barefoot condition. Also، no significant differences were observed in median and bandwidth frequencies. Nano shoes compared to barefoot running could lead to more frontal stability. However، using Nano shoes compared to PVC didn’t show any significant change in frequency contents.