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  • 标题:野球内野手のゴロ捕球におけるステップ調節様式
  • 本地全文:下载
  • 作者:小倉 圭 ; 川村 卓 ; 金堀 哲也
  • 期刊名称:体育学研究
  • 印刷版ISSN:0484-6710
  • 电子版ISSN:1881-7718
  • 出版年度:2017
  • 卷号:62
  • 期号:2
  • 页码:511-522
  • DOI:10.5432/jjpehss.17003
  • 语种:Japanese
  • 出版社:Japan Society of Physical Education, Health and Sport Sciences
  • 摘要:

    The purpose of this study was to clarify the types of step adjustment performed by baseball infielders for catching a grounder in relation to skill level. The subjects were 18 amateur baseball infielders, whose fielding motions were videotaped using 2 high-speed video cameras (300 Hz). The 3-dimensional coordinates of both the toes and the ball were obtained using the DLT method. The top 9 subjects who showed small variations in the grounding point of both feet when adopting the catching posture were defined as a high-performance group, and the bottom 9 subjects were defined as an intermediate-performance group. The results obtained were as follows: 1) Baseball infielders modified each grounding point from 4 steps to 1 step before catching in order to acquire the most appropriate catching point, and the final step was highly reproducible. 2) The high-performance group showed a significantly smaller standard deviation in the 1 step before the grounding point than the intermediate-performance group. 3) In the high-performance group, there was a positive correlation between the standard deviation of step length 1 step before and the standard deviation of the grounding point from 5 steps to 2 steps before. These results suggest it is important to reduce variations in the grounding point 1 step before by earlier perception of the error in the front-to-rear direction of the grounding point. These results could provide important insight for coaches or trainers attempting to improve the performance of infielders when catching a grounder.

  • 关键词:fielding a grounder;ゴロ処理;dispersion of grounding point;接地位置のばらつき;step length;歩幅;catching point;捕球位置
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