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最終更新日：2026/02/23
山下 大地
ヤマシタ ダイチ
(Daichi Yamashita)
論文
- タイトル
- タイトル（英）
- Kinematic Comparison of Successful Split Jerk and Unsuccessful Frontward Barbell Drop Among Japanese National-Level Male Weightlifters.
- 参照URL
- https://researchmap.jp/daichiyamashita/published_papers/52203081
- 著者
- 著者（英）
- Hideyuki Nagao,Naoyuki Kobatake,Toshiro Takemata,Daichi Yamashita,Yasuyuki Kubo
- 担当区分
- 概要
- 概要（英）
- PURPOSE: This study aimed to investigate the success factors of split jerks from a kinematic perspective among Japanese national-level male weightlifters by analyzing barbell trajectories and lifter's motion. METHODS: Among the participants of the all Japan weightlifting championships, 13 athletes were selected for analysis. Each met the criteria of successfully performing a jerk attempt after a failed attempt due to a frontward barbell drop with the same weight. Using motion analysis of recorded videos, the kinematics of the barbell, angles of the lower-limb joints, and trunk during the jerk were calculated and compared between successful and unsuccessful lifts. RESULTS: No significant differences were observed in the vertical and horizontal velocity of the barbell. However, the backward displacement in the catch phase and throughout the jerk was significantly greater for successful lifts than for unsuccessful lifts (P < .05, Cohen's d > 0.50). Furthermore, the range of motion of the trunk and the peak extension velocity of the hip and trunk in the drive phase were significantly greater in successful lifts than in unsuccessful lifts. By contrast, the peak knee flexion angular velocity in the dip phase was significantly greater in unsuccessful lifts compared with successful ones (P < .05, Cohen's d > 0.50). CONCLUSIONS: These results suggest that moving the barbell backward widely is one of success factors of the split jerk, which may have been influenced by the trunk movement associated with the hip extension motion. In addition, rapid knee flexion during the dip phase may reduce the likelihood of a successful split jerk.
- 出版者・発行元
- 出版者・発行元（英）
- 誌名
- 誌名（英）
- International journal of sports physiology and performance
- 巻
- 号
- 開始ページ
- 1
- 終了ページ
- 8
- 出版年月
- 2026年2月12日
- 査読の有無
- 査読有り
- 招待の有無
- 掲載種別
- 研究論文（学術雑誌）
- ISSN
- DOI URL
- https://doi.org/10.1123/ijspp.2025-0193
- 共同研究・競争的資金等の研究課題