両足支持期におけるハンマー頭部の移動距離の内訳

概要

論文の詳細を見る
Two hammer throwers were studied using three-dimensional motion analysis procedures. One was a top national athlete with the best record 72.32 m, another was an university athlete with the best record 56.84 m. Hammer speed increased gradually during each double-support phase. Since the distal end velocity consists of the velocities which are the each cross product of the proximal angular velocity vector and the position vector from the proximal to the distal, hammer velocity was resolved into the velocities which were relative to the lower limbs, the body, the upper limbs and the hammer. During each double-support phase, the traveling length of the hammer head was calculated by integrating hammer velocity, and the motion-dependent traveling lengths of the hammer head were calculated by integrating the resolved velocities. In each turn, the motion-dependent length relative to the lower limbs was long, but in delivery the sum of the motion-dependent length relative to the body and the upper limbs was long. It seemed that in delivery the hammer head had better be accelerated by twisting the body, driving backward the upper body and extending the shoulder joint.
中京大学の論文
1997-10-31