| Summary: | 碩士 === 國立臺灣師範大學 === 運動科學研究所 === 99 === Most designs of sports shoes focus on vertical cushion, but reducing horizontal force is also important. It would produce large moment, cause muscle vibration and impact our surface skin. Some researchers noticed sliding surface may reduce the horizontal force, but the ideal sliding amount is still unclear. Purpose: The purpose of this study was to provide different sliding effects by using different stiffness of springs to determine the ideal amount of sliding which can postpone the impact occurred and reduce both vertical and horizontal forces. Methods: 12 participants volunteered for this study, each participant was asked to perform walking, jogging and running on all four sets of springs in randomized order. Kinetic and kinematic data were calculated in this study. Results: Appropriate stiffness of springs (k=0.067~1.99 kgf/mm) could provide better vertical and horizontal cushion and reduce joint loading. But lower stiffness of springs may decrease the power during push off, influence the efficiency of running. Conclusions: To apply our findings on outsole design, we can use softer materials or provide more cuttings on rear foot, to reduce the impact during heel strike. And provide appropriate stiffness on the front forefoot to raise running speed. And try different movements to apply on more kinds of sports in future study.
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