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最終更新日：2024/04/11
山下 大地
ヤマシタ ダイチ
(Daichi Yamashita)
論文
- タイトル
- タイトル（英）
- Effect of two weeks of training cessation on concentric and eccentric knee muscle strength in highly trained sprinters.
- 参照URL
- https://researchmap.jp/daichiyamashita/published_papers/42968328
- 著者
- 著者（英）
- Daichi Yamashita,Kosuke Hirata,Kazuhiko Yamazaki,Iñigo Mujika,Naokazu Miyamoto
- 担当区分
- 筆頭著者
- 概要
- 概要（英）
- Athletes often experience short-term training cessation because of injury, illness, post-season vacation, or other reasons. Limited information is available about the effect of short-term (less than four weeks) training cessation on muscle strength in athletes. Sprinting athletes must maintain knee extension and flexion strength to reduce the risk of sprint-type hamstring strain injury. This study aimed to identify whether and to what extent knee extension and flexion torque in concentric and eccentric contractions is reduced by two weeks of training cessation in sprinters. Before and after the training cessation, maximal voluntary isokinetic knee extension and flexion torque in slow and fast concentric (60 and 300°/s) and slow eccentric (60°/s) contractions were assessed in 13 young male highly trained sprinters (average World Athletics points = 978). Knee flexion torque during the bilateral Nordic hamstring exercise (NHE) was also measured. After the training cessation, isokinetic concentric at 300°/s and eccentric torque were significantly reduced in both knee extension and flexion. There was no difference in the magnitude of reduction between isokinetic knee extension and flexion torques in all conditions. The relative changes were more notable in eccentric (-15.0%) than in concentric contraction at 60°/s (-0.7%) and 300°/s (-5.9%). Knee flexion torque during the NHE also declined (-7.9% and -9.9% in the dominant and non-dominant legs, respectively). There was no significant correlation between the relative reductions in isokinetic knee flexion torque and knee flexion torque during the NHE. The findings suggest that sprinters and their coaches should focus on recovering fast concentric and slow eccentric knee extension and flexion strength after two weeks of training cessation.
- 出版者・発行元
- 出版者・発行元（英）
- 誌名
- 誌名（英）
- PloS one
- 巻
- 18
- 号
- 7
- 開始ページ
- e0288344
- 終了ページ
- 出版年月
- 2023年7月7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/10.1371/journal.pone.0288344
- 共同研究・競争的資金等の研究課題