Abstract

Objective: The aim of this study was to analysis the GRF of vertical jumping to head a ball by male students who were suffering from flexible flat foot. Methods: A Total 600 male students participated in a public physical education class, test lines (Feiss test) and box mirror recognition parenthesis plantar, evaluated precision. After examination of 15 students with smooth feet from grades 2 and 3 with a mean age (73/22), height (60/174) and weight (87/69) as a group of people and number of floor flat foot with 15 students having a normal plantar arch, with a mean age (13/23), height (40/176) and weight (55/69) as a group of people were natural foot floor. Samples necessarily are not soccer. Subjects on the page of the Force (Force plate) had to jump and hit the head football peak at a height commensurate with each individual jump, jump and act did tick off. Day 3 foot jump right individuals’ natural floor flat foot on the floor and individuals of different directions Kinetic was evaluated. Data obtained from independent t-test were analyzed Results & Findings: The results suggest a significant difference in kinetic patterns of vertical jumping of individuals with flat foot in vertical direction (P=0. 01), as well as in kinematics’ pattern of total contact time of foot to ground in individuals with flat foot and normal foot (P=0.01). In the other directions (saggital and mediolateral) there were no significant differences between two groups of test subjects (P≥0.05). Discussion and conclusion: In general, the results of this study shows that the values of ground reaction forces in vertical direction are higher in individuals with flat foot compared to those with normal foot; moreover there is difference between the total contact time to ground of foot among individuals with flat foot and those with normal foot.