B36 サッカーのインステップキック動作における蹴り脚の膝伸展運動に貢献する動力学的要因(サッカー)

概要

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The purpose of this study was to examine the kinetic factors contributed to knee extension movement of kicking leg in soccer instep kick. Twelve skilled soccer players performed maximal instep kick. The kicking motion was captured using a three-dimensional cinematographic technique at 250Hz and two force platforms. A ball behavior was recorded by two high-speed cameras at 500Hz. The kinetic factors were computed using the dynamic model of kicking movement composed of 8 segments (trunk, pelvic, right and left thighs, shanks, and foots) and 18 degrees of freedom. The mean ball speed was 24.7±2.6m/s. The mean knee extension angular velocity was 24.6±3.0rad/s. Results shown that the pelvic joint torque (80.6%) and knee extension centripetal force-dependent torque (108.0%) contributed to knee extension. Knee extension centripetal force-dependent torque was generated by hip flexion-extension centripetal force. Knee extension joint torque was negative value (-99.9%). In addition, knee extension (22.0%) and hip external rotation (17.8%) ground reaction force-dependent torque contributed to knee extension in support leg.
2007-11-13