Spin on Fastballs Thrown by Elite Baseball Pitchers
Spin on Fastballs Thrown by Elite Baseball Pitchers
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DOI：
10.1249/mss.0b013e318220e728
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发表时间：
2011-12-01
期刊：
影响因子：
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通讯作者：
Kanosue, Kazuyuki
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文献类型：
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作者：
Nagami, Tomoyuki;Morohoshi, Jun;Kanosue, Kazuyuki
NAGAMI, T.、J. Morohoshi、T. Higuchi、H. NAKATA、S. NAITO 和 K. KANOSUE。旋转精英棒球投手投出的快球。医学。科学。体育锻炼，卷。 43，第 12 期，第 2321-2327 页，2011 年。目的：在本研究中，我们分析了精英大学和职业投手投出的棒球的旋转轴角度方向和旋转速率。方法：用高速摄像机以每秒 1000 帧的速率拍摄球从出手前到出手后 200 毫秒的视频图像。使用定制设备来分析旋转轴角度和旋转速率。结果与结论：大学投手和职业投手的旋转轴角度方向或旋转速率没有显着差异。旋转速率和球速之间存在显着的相关性；也就是说，球速越高，旋转速度越大。此外，受试者之间旋转速度的偏差比球速的偏差更大。对于所有受试者，旋转轴的方位角和仰角分别为19度+/-14度和-32度+/-9度。一些投手能够在他们的快球上打出特有的旋转；这种旋转的性质可能与他们的投球成功有关。
NAGAMI, T., J. MOROHOSHI, T. HIGUCHI, H. NAKATA, S. NAITO, and K. KANOSUE. Spin on Fastballs Thrown by Elite Baseball Pitchers. Med. Sci. Sports Exerc., Vol. 43, No. 12, pp. 2321-2327, 2011. Purpose: In this study, we analyzed the direction of the spin axis angles and the spin rate of baseballs pitched by elite collegiate and professional pitchers. Method: The video image of a ball being pitched was taken from the period just before release until 200 ms after release with a high-speed video camera at a rate of 1000 frames per second. A custom-made device was used to analyze the spin axis angle and the spin rate. Results and Conclusion: There were no significant differences in the direction of the spin axis angles or the spin rate between collegiate and professional pitchers. A significant correlation was obtained between spin rate and ball speed; that is, the higher the ball speed, the greater the spin rate. In addition, the spin rate deviated more across subjects than did ball speed. For all subjects, the azimuth and elevation of spin axis were 19 degrees +/- 14 degrees and -32 degrees +/- 9 degrees, respectively. Some of the pitchers were able to put a characteristic spin on their fastball; the nature of this spin could be related to their pitching success.