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  • 川端 浩一, 浦田 達也, 伊藤 章
    コーチング学研究
    2013年 26 巻 2 号 197-202
    発行日: 2013/03/20
    公開日: 2019/09/02
    ジャーナル フリー

        This study investigates the catcherʼs throwing time to second base (time from the ball being caught to the completion time of the thrown ball reaching second base). The throwing motion of college baseball catchers (n=12) and the catching motion of a second baseman were videotaped at 210 Hz using different high-speed cameras. The throwing time was divided into the motion time (time from the ball being caught to being released) and the airborne time (time from the ball being released to the ball reaching second base). The motion time was further divided into the hold time (time from the ball being caught to the ball being held in the right hand), the stride time (time from the ball being first held in the right hand to the lead foot contact), and the release time (time from the lead foot contact to the ball release). To evaluate the throwing ability of the catchers, the throw distance was measured. There were no significant correlations between the throwing time and the motion time, but there were significant positive correlations between the throwing time and the airborne time. These results indicate the importance of increasing the initial velocity of the ball after release. There were no significant correlations between the throwing time and the hold time, or between the throwing time and the stride time. However, there were significant negative correlations between the throwing time and the release time, and the airborne time showed a significant negative correlation with the release time. These results suggest that catchers exhibiting the shorter the throwing times attempted to increase the initial velocity of the ball after release, although the release time became longer. Throw distance showed a significant negative correlation with the airborne time. These results clearly demonstrate the necessity of increasing throw distance to obtain a higher initial velocity of the ball at release.

  • 雜賀 亮一
    太成学院大学紀要
    2010年 12 巻 127-138
    発行日: 2010年
    公開日: 2017/05/10
    研究報告書・技術報告書 オープンアクセス
    野球は,「各チームは,相手チームより多くの得点を記録して,勝つことを目的としている。正式試合が終わったとき,本規則によって記録した得点の多い方が,その試合の勝者となるである」(公認野球規則,2009) 基本的には,1回から9回の間で相手チームよりたくさん得点し,勝つことを目的としておこなわれるスポーツであり,サッカーやラグビー等のように時間に制約されることなく,同じ条件で攻守が与えられる。本研究では,時間に制約されることのない野球において,先制点が試合の勝利に優位を示すかを調べた。先制点をあげたチームの勝率から,先制点が勝敗にどのような影響を及ぼすかを分析すると共に,勝つために望ましいゲーム展開を考えた。結果,先制点をあげたチームの勝率が高く,先に得点することが勝敗に影響を及ぼすことが判った。結果をもとに勝つために望ましいゲーム展開を考えると,前半(1回〜3回)に全神経を集中させ,この間に先制点をあげる為の攻守の戦術をいの一番に考え,明確にして試合に臨むことが重要であるといえる。
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