Study on Impact of Hardness of Sole on Force on Feet during Active Falling

Abstract

The purpose is to study effect of sole on force on feet as an additional factor when human body actively falls at different heights. Methods: 12 male subjects respectively wore three pairs of shoes with different cushioning performances and fell actively at the heights 20cm, 40cm and 60cm. Ground reaction force, pressure distribution on feet, and angle of ankle motion during impact from falling were acquired and analyzed synchronously. Results: Compared with ordinary soles, softer soles can effectively reduce the peak impact force during the impact process, prolong the time interval between the first peak and the second peak of the impact force, and at the same time reduce the maximum and maximum intensity of pressure on the plant, increase the area where plant is in contact with sole, and reduce range of motion of ankle. Conclusions: In comparison with sports shoes with ordinary sole, wearing sports shoes with softer sole can effectively reduce intensity of plantar peak pressure, intensity of mean pressure, peak pressure, and play a good role in shock absorption. Therefore, the softer sole of sports shoes can effectively relieve the burden on the feet, enhance the comfort of the feet, and reduce the chance of sports injuries. 361

Plantar Pressure Evaluation during the Season in Five Basketball Movements

“…Despite that, minimum differences between both moments of acquisition can be observed, with higher values at the first moment of acquisition (T1). One of the factors that can influence this variation is the shoe insole, which could be damaged by use (getting stiffer); the saturation of the airbox that most shoes have can also influence the athlete's performance [15,34]. Harder shoes/insoles tend to increase plantar pressure values; however, in this study, the athletes always wore their normal shoes/insoles and, therefore, the actualized perceptual comfort of the shoes/insoles allowed, to some extent, the self-adjustment of movement intensity.…”

“…Hence, sports shoe conditions, with the increasing number of training sessions, can be softer and allow a reduction in plantar pressure value induced during sports practice. According to Ke et al [34], the type of sole and its condition is very important, not only for the comfort of the athlete but also to relieve the induced pressure and, thus, decrease the probability of the athlete suffering injuries.…”