Analysis of basic ability of baseball batting

棒球击球基本能力分析

• 批准号: 17300212
• 负责人: KANOSUE Kazuyuki
• 金额: $ 9.05万
• 依托单位: Waseda University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17300212/
• 关键词: Baseball; Batting; accuracy; トレーニング; コーチング; 正確性

Baseball batting is one of the most difficult task in that the batter has to hit the ball over 150km/h with a thin bat of 6cm in diameter. And batters are required to send a hit with batting average over 300. To accomplish this it is necessary to achieve accurate bat control. It has been believed that a good batter can swing a bat with the accuracy of mm order. In the present study, 10 university baseball players hit a ball on a tee that was set at the center of strike zone 20 times. The trajectory of the bat was taken by high speed video camera and the deviation of bat swing in the vertical direction was measured and the standard deviation(SD) of the deviation was calculated as a measure of bat swing accuracy. The SD was 1.1±0.3cm. This was larger than the value generally believed. It was suggested that the size of ball(6cm) and bat(6cm) permits to produce a good batting even when the center of the ball is 1cm off the center of bat at the hit. This probably prevent the accuracy to develop further. If players use a thin bat and small balls, they might be able to get better accuracy in swing.

棒球击球是最困难的任务之一，击球手必须用直径6厘米的细棒以超过150公里/小时的速度击球，并且击球手的击球平均数必须超过300。人们认为，优秀的击球手可以以 mm 级的精度挥动球棒。在本研究中，10 名大学棒球运动员在位于击球区中心的发球台上击球。通过高速摄像机拍摄20次球棒的运动轨迹，测量球棒在垂直方向上的摆动偏差，并计算偏差的标准偏差(SD)作为球棒摆动精度的衡量标准。 1.1±0.3cm 这比一般认为的值要大，建议球（6cm）和球棒（6cm）的尺寸即使在球中心偏离球棒中心1cm的情况下也能产生良好的击球效果。这可能是在命中。如果球员使用细球棒和小球，他们可能会获得更好的挥杆准确性。

项目成果

Effects of muscle cooling on the stiffness of the human gastrocnemius muscle in vivo.

肌肉冷却对体内人体腓肠肌硬度的影响。

• 发表时间: 2008
• 作者: T.Muraoka; et. al.
• 通讯作者: et. al.

Changes in muscle activity with increase in leg stiffness during hopping.

跳跃过程中肌肉活动随着腿部僵硬的增加而变化。

• 发表时间: 2007
• 作者: H.Hobara; K.Kanosue;S.Suzuki
• 通讯作者: S.Suzuki

Effects of muscle cooling on the stiffness of the human gastrocnemjus muscle in vivo

肌肉冷却对人腓肠肌体内僵硬度的影响

• 发表时间: 2008
• 作者: T.Muraoka; et. al.
• 通讯作者: et. al.

やさしい生理学(改訂第5版)

简易生理学（修订版第五版）

• 发表时间: 2005
• 作者: 彼末一之

Effects of muscle cooling on the stiffness of the human gastrocnemius muscle in vivo.

肌肉冷却对体内人体腓肠肌硬度的影响。

• 发表时间: 2008
• 作者: T. Muraoka; et. al.
• 通讯作者: et. al.