短距離疾走の加速過程における運動の変化 : 歩幅,サイクル数,上体の前傾,および下肢関節群を中心として

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This paper attempts to clear the changes of running motion during the accelerating process in the sprint dush from rest to the maximum velocity, employing six top ranked sprinters in Japan to the subjects of the group A. And secondly, we attempt to clear the tasks on the motor learning of the sprint running through the comparison with the poor sprinters' group. For this study, a cinematographic method with the use of computer analysis was employed to obtain data. It was founded that there were various changes orderly and clearly on the lower limb actions and on the running rhythm with increase of the velocity, especially on the trunk lean and on the knee joint movement during the first half of the driving phase and the latter half of the recovery phase at the group A, but not so clear at the poor group. To conclude, it would be able to say that these changes of motion during the accelerating process were successive changes of type of motion from a low gear type, namely a piston type, of motion to a high gear type, namely a swing type, of motion. Because, the results of this study showed the two extremes standed out in sharp contrast to each other on their typs of motion. The former was represented mainly by a deep flexed and concentric knee action of shortenning and lengthening with a relatively long supporting phase in a step, but on the other hand the latter was represented mainly by a little flexed and rapid eccen-tric knee action for a negative work during a shortened supporting phase, and by a 'wield-a-whip' like swinging lower limb action during relatively lengthened recorery phase.
東海大学の論文

短距離疾走の加速過程における運動の変化 : 歩幅,サイクル数,上体の前傾,および下肢関節群を中心として

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