ハードル走における下肢3次元関節トルクおよび関節トルクパワー

抄録

The purpose of this study was to three-dimensionally investigate joint torques and joint torque powers of the lower limbs in sprint hurdles. Male and female hurdlers and multi-event athletes in sprint hurdles were videotaped (200 fps) with two high-speed cameras which were panned. Ground reaction forces during the take-off and touchdown phases were measured with a Kistler force platform (500 Hz). Kinetic analysis procedures were carried out to estimate joint torques and joint torque powers of the lower limbs. The results were summarized as follows: The patterns of the joint torques and the joint torque powers of the lower limbs during the recovery and preparatory phases showed similarities with those of sprinting, for instance, the negative powers of the knee joint just before the touchdown were observed both in the preparatory phase of sprint hurdles and in the recovery phase of sprinting. On the other hand, the patterns of the joint torques and the joint torque powers during the take-off phase and hurdling phase were different from those of sprinting. Finally, it was inferred that the lateral swing of the trail leg appeared in the first half of hurdling was caused by the joint force power and the flexion torque power of the hip joint rather than active abduction-adduction torque of the hip joint.