Effect of Sprinting Distance on Leg Stiffness

• Main Authors: Tsai, Yuan-Yu, 蔡元毓
• Other Authors: Chen, Ti-Yu
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/95357608174067667324

碩士 === 國立彰化師範大學 === 運動學系應用運動科學碩士班 === 104 === The purpose of this study is to investigate the effect of sprinting distance on kinetic, kinematic, and also on stiffness and the modulation of leg stiffness. Nine healthy male high school sprinters volunteered for this investigation and all of them were trained for over 6 month. The participants’ physical characteristics were the following: height, 172.9  4.197 cm; body mass, 62  7.01 kg; and age, 15.51  2.86 years (mean ± SD). The participants performed the tasks of 5m, 15m, 25m, and 35m sprint. Seven Kistler force plates to prevent the incoordination from aiming one single plate and eight well placed VICON FX40 cameras to collect kinematic data. The rapeated measures of one-way ANOVA, and the HSD post-hoc were used for the statistical testing of the conditions for the sprints (α = .05). The results showed that the knee-extention moment and knee stiffness had significant differences on the distance variation (p < .05); the hip and ankle extention moment and stiffness and leg stiffness had no significant differences on the distance variation (p > .05).