The Effect Of Speed And Track Shoes On Plantar Pressure

Foot injuries in sprint have been one of the leading puzzles for athletes and coaches. They are also one of the problems which should be solved by doctors. Thus, mechanism of foot injuries and ways to prevent them are hotspot in sport science. Discussion of the mechanism to prevent injuries using shoes is especially focus of scientists. In this dissertation, sports biomechanics methods and plantar pressure measurement system are used, ten elite sprint athletes from Northeast Normal University have been tested of their way on the running under three conditions.Through comparison of foot biomechanical characteristic under two kinds of speed and condition during running, conclusions of the relationship between speed and foot pressure distribution, the effect of different sneakers on foot pressure distribution are found in order to supply theoretical foundation and data reference to foot injuries during running and research into the functional characteristic of sneakers separately.Results shows,:First, with ordinary sports shoes running slowly, order of the foot touch with floor is from heel to out and then to the whole foot. At the moment of sustain, foot pressure is gathered at heel of the foot; at the moment of step off, pressure of front sole is located at the first phalanx, the second, the first, and the fifth metatarsus. Thus, more pressure is loaded at the first phalanx, the second, the first, and the fifth metatarsus than any other areas, which suggests easy fatigue and trauma. Meanwhile, when running fast, almost no pressure is located at heel of the foot while front sole loaded them almost all. Moreover, with increased pressure while decreased time for sustaining, wallop increased thus easily cause trauma. From the point of view of intensity of pressure, increase pressure and decreased touch area suggest increased intensity of pressure and also easy trauma.Second, with two different sports shoes running fast, bigger peak pressure are located when with track shoes than ordinary. Also, pressure obviously increased at the second metatarsus. In the above three different instances, which are ordinary sports shoes running slowly, ordinary sports shoes running fast and track shoes running fast, average ratio of peak pressure to weight are separately: 1.029±0.142,1.148±0.118,1.317±0.132。Third, for those athletes aiming at success, the author suggests, specially designed sports shoes according to different games and its different pressure distribution on foot are more suitable because materials for tread of those shoes are changed, which prevents outranged pressure at a special area thus prevents trauma. However, for ordinary people who chaste fitness, suitable speed of race and specific anatomical suited sports shoes are suggested.