2022 Fiscal Year Final Research Report
The Effect of Wearing a Baseball Helmet with a Brim and ear-guards on Hitting Accuracy
| Project/Area Number |
19K11469
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 59020:Sports sciences-related
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| Research Institution | Tokyo International University |
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Principal Investigator |
Akaike Kohei 東京国際大学, 人間社会学部, 准教授 (40615556)
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| Co-Investigator(Kenkyū-buntansha) |
麓 正樹 東京国際大学, 医療健康学部, 教授 (40339180)
碓井 外幸 東京国際大学, 人間社会学部, 教授 (60389822)
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | 球種 / 球種情報の事前告知 / ヘルメット装着の有無 / 打撃精度 / 補正動作 |
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| Outline of Final Research Achievements |
When hitting a pitch type like a curveball that seems to slip upward just after being released from a pitcher’s finger, baseball batters may exhibit greater upward head movement due to visual tracking, which can negatively affect hitting accuracy. First, in our study involving hitting a ball put on the tee stand statically, we identified that wearing a baseball helmet with a brim and ear-guards that restricts the upper field of view increases the upward movement of the head during the initial phase of swing and affects hitting accuracy. Furthermore, we conducted experiments under more practical conditions, using two different types of pitch (fastball, curveball) moving toward the batter, adopting three factors and six conditions that replicated game situations, i.e, the type of pitch, with or without a helmet, and pre-informed about the type of pitch or not. As a result, it is revealed that the type of pitch affects head and trunk movements as well as hitting accuracy.
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| Free Research Field |
身体運動科学
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| Academic Significance and Societal Importance of the Research Achievements |
実際に動いてくるボールを打つ、野球の打撃に関する報告はあるものの、そのほとんどは打撃動作初期の頭部の垂直方向への動きに言及していない。我々はまず、静止した状態のボールを打つ実験から、上方視野制限をもたらす野球用ツバ付きヘルメット装着が頭部の上方向への動きと打撃精度に影響を及ぼすことを確認した。さらに実際に打者に向かって投射される2つの異なる球種（ストレート、カーブ）を打つ実験からは、球種が動作初期の頭部上方変位とバット面上打点位置に影響を及ぼすことを確認した。このことは、打撃精度を左右すると考えられている動作初期における頭部の動きに対して、パフォーマンス改善の有効な手立ての一つとなり得る。
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