The functional significance of hamstrings composition: is it really a “fast” muscle group?

Pavlos E. Evangelidis*, Garry J. Massey, Richard A. Ferguson, Patrick C. Wheeler, Matthew T.G. Pain, Jonathan P. Folland

*この研究の対応する著者

研究成果: Article査読

18 被引用数 (Scopus)

抄録

Hamstrings muscle fiber composition may be predominantly fast-twitch and could explain the high incidence of hamstrings strain injuries. However, hamstrings muscle composition in vivo, and its influence on knee flexor muscle function, remains unknown. We investigated biceps femoris long head (BFlh) myosin heavy chain (MHC) composition from biopsy samples, and the association of hamstrings composition and hamstrings muscle volume (using MRI) with knee flexor maximal and explosive strength. Thirty-one young men performed maximal (concentric, eccentric, isometric) and explosive (isometric) contractions. BFlh exhibited a balanced MHC distribution [mean ± SD (min-max); 47.1 ± 9.1% (32.6–71.0%) MHC-I, 35.5 ± 8.5% (21.5–60.0%) MHC-IIA, 17.4 ± 9.1% (0.0–30.9%) MHC-IIX]. Muscle volume was correlated with knee flexor maximal strength at all velocities and contraction modes (r = 0.62–0.76, P < 0.01), but only associated with late phase explosive strength (time to 90 Nm; r = −0.53, P < 0.05). In contrast, BFlh muscle composition was not related to any maximal or explosive strength measure. BFlh MHC composition was not found to be “fast”, and therefore composition does not appear to explain the high incidence of hamstrings strain injury. Hamstrings muscle volume explained 38–58% of the inter-individual differences in knee flexor maximum strength at a range of velocities and contraction modes, while BFlh muscle composition was not associated with maximal or explosive strength.

本文言語English
ページ(範囲)1181-1189
ページ数9
ジャーナルScandinavian Journal of Medicine and Science in Sports
27
11
DOI
出版ステータスPublished - 2017 11 1
外部発表はい

ASJC Scopus subject areas

  • 整形外科およびスポーツ医学
  • 理学療法、スポーツ療法とリハビリテーション

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