平均台における後方倒立回転とびと後方伸身宙返りの踏切りに関する運動形態学的一考察 : シリーズとしての後方倒立回転とびからの接続局面において

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概要

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• Purpose of Study A series is an existing representative skill in the free item of a balance beam. An important point in a series is the first aspect of touching the beam as it becomes the take-off aspect of the next skill. This study considered the continual Flic-Flac and Salto backword Stretched, paid attention to take-off aspect showing the resembling movement process, and drew common factors to clarify their functional differences. Three subjects who are capable of performing two kinds of series were chosen and considered from a kinesiomorphological point of view. Consideration In considering the skill differences during take-off caused from two different tasks, the position of foot in contact with the beam in Salto backword Stretched was far with rapid right thigh split after the hands touched the beam The rhythmic difference making this thigh down influenced on hands off and uprise of the upper body. In Salto backword Stretched, because of the far position of right feet touching the beam, uprise of the upper body became later than the continual Flic-Flac-Flic-Flac. When the locus of waist was in the lowest position, the upper body leaned forward and the arms were in low position. On the other hand, in continual Flic-Flac-Flic-Flac, the rising speed of the arms was faster than Salto backword Stretched because of the strong hand release. Therefore, when the locus of waist was in the lowest position, the upper body became vertical and the arms were in rather high position. Furthermore, as a prior action for the next task, hyper extension of the head was observed. The differences above influenced the aspect of leaving off the beam, Swinging of arms and sharp leaning of the upper body was emphasized in continual Flic-Flac-Flic-Flac which then continue to touch the beam. In Salto backword Stretched, the sharp pulling of the arms after leaning forward the upper body formed pulling action in Salto. These were considered to be differences of skill caused from the task.

• 東京女子体育大学・東京女子体育短期大学の論文

著者

• 山田 まゆみ

  東京女子体育大学・短期大学

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