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最終更新日：2024/03/27
山岸 卓樹
ヤマギシ タカキ
(Takaki Yamagishi)
論文
- タイトル
- タイトル（英）
- Fatigue-induced changes in hamstrings’ active muscle stiffness: effect of contraction type and implications for strain injuries
- 参照URL
- https://researchmap.jp/7000019636/published_papers/40955110
- 著者
- 著者（英）
- Pavlos E. Evangelidis,Xiyao Shan,Shun Otsuka,Chi Yang,Takaki Yamagishi,Yasuo Kawakami
- 担当区分
- 概要
- 概要（英）
- Abstract Purpose Hamstring strain injuries may occur due to differential fatigue and compromised mechanical properties among the hamstring muscles. We examined (1) the effect of fatigue on hamstrings active muscle stiffness, and (2) whether contraction type affects active muscle stiffness changes during a submaximal fatiguing task. Methods Nine healthy males completed 99 submaximal knee flexions in isometric (ISO), concentric (CON), and eccentric (ECC) conditions. We measured the knee flexor maximal voluntary torque (MVT) (pre/post), shear wave velocity (SWV) during contraction and transverse relaxation times (T2) (pre/post) in biceps femoris long head (BFlh), semitendinosus (ST), and semimembranosus (SM) muscles. Results MVT decreased substantially after all conditions (− 18.4 to − 33.6%). The average relative torque sustained during the task was lower in CON than ISO and ECC, but absolute torque was similar. SWV interindividual responses were highly variable across muscles and contraction types. On average, BFlh SWV tended to increase in ISO (0.4 m/s, 4.5%, p = 0.064) but decreased in ECC condition (− 0.8 m/s, − 7.7%, p < 0.01). ST SWV decreased in CON (− 1.1 m/s, − 9.0%, p < 0.01), while it remained unchanged in ISO and ECC. SM SWV decreased in CON (− 0.8 m/s, − 8.1%, p < 0.01), but it was unaffected in ISO and variable in ECC. Conclusion Fatigue has a differential effect on the mechanical properties of the constituent hamstring muscles, as measured with shear wave elastography, depending upon contraction type. We found preliminary evidence that BFlh is more fatigued than ST or SM during eccentric contractions, which may explain its susceptibility to strain injuries.
- 出版者・発行元
- 出版者・発行元（英）
- Springer Science and Business Media LLC
- 誌名
- 誌名（英）
- European Journal of Applied Physiology
- 巻
- 123
- 号
- 4
- 開始ページ
- 833
- 終了ページ
- 846
- 出版年月
- 2022年12月10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
- 1439-6319
- DOI URL
- https://doi.org/10.1007/s00421-022-05104-0
- 共同研究・競争的資金等の研究課題