サイドステップからの素早い走方向変更動作

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  • サイドステップ カラ ノ スバヤイ ソウ ホウコウ ヘンコウ ドウサ
  • The rapid running direction change movement from a side step

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In this study, we investigated the ground reaction force (GRF) and leg motion during change of running direction from a side step. Three kinds of direction change tasks, 60 degrees, 90 degrees, and 120 degrees, were set up. The subjects were chosen and divided into two groups, fast group and slow group, according to the averages, the movement time and the velocity of center of gravity movement in 120 degrees task. As the direction change angle increased, the velocity of center of gravity movement decreased, the load of the direction of movement where the GRF carries out the role of a brake became large, the grounding angle and the amount of change of the grounding to the maximum flexion angle of an ankle joint were increased with both groups. In each direction change tasks, the fast group had the load larger than slow group to backward, and the power to kick forward was large. In addition, as the direction change angle increased, the load for backward of slow group became was smaller, and influenced extension of movement.

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