著者
Osamu Yanagisawa Hidenori Taniguchi
出版者
The Society of Physical Therapy Science
雑誌
Journal of Physical Therapy Science (ISSN:09155287)
巻号頁・発行日
vol.32, no.9, pp.578-583, 2020 (Released:2020-09-01)
参考文献数
23

[Purpose] To evaluate the relationship between stride length during a pitch and maximal ball velocity and define the determinants of stride length in collegiate baseball pitchers. [Participants and Methods] Eighteen collegiate baseball pitchers participated in this study. Using a standard tape measure, the distance between each participant’s legs was measured after maximal abduction of both hip joints in a standing position. The pitchers threw fastballs on an indoor pitching mound at an official pitching distance. The throwing motion was recorded with four high-speed video cameras (240 Hz), while the ball velocity was measured using a radar gun. The stride length at foot contact was calculated at the maximal ball velocity using a three-dimensional motion analysis system. [Results] The maximal ball velocity (mean 129.8 km/h) had a significant positive correlation with the absolute stride length during a pitch (r=0.55), but no correlation with the relative stride length (% body height, % lower extremity length, and % maximal open legs’ width). Stride length during a pitch did not significantly correlate with the pitcher’s body height, lower extremity length, and maximal open legs’ width. [Conclusion] A longer stride length contributes to a higher ball velocity in collegiate baseball pitchers.

言及状況

外部データベース (DOI)

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投球時における軸足と踏み出し足の距離(stride length)とボールの速度に有意な正の相関があったと言う報告。stride lengthが短いと速度を十分に出せないので、大きく踏み出すことで改善されるかもしれません。 ただ、疲れるので試合中は調節した方が良いとの考察も。 https://t.co/Xo19I6obU7
Another study showing the correlation of a longer stride length to ball velocity. BUT..it’s not just opening up more, it’s how you get there that makes the difference. #baseball #legpower #corestrength #BASE3 https://t.co/pvjzSgjXuu

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