Training-induced changes in muscle architecture and specific tension

Yasuo Kawakami*, Takashi Abe, Shin Ya Kuno, Tetsuo Fukunaga

*この研究の対応する著者

研究成果: Article査読

224 被引用数 (Scopus)

抄録

Five men underwent unilateral resistance training of elbow extensor (triceps brachii) muscles for 16 weeks. Before and after training, muscle layer thickness and fascicle angles of the long head of the triceps muscle were measured in vivo using B-mode ultrasound, and fascicle lengths were estimated. Series anatomical cross-sectional areas (ACSA) of the triceps brachii muscle were measured by magnetic resonance imaging, from which muscle volume (Vm) was determined and physiological cross-sectional area (PCSA) was calculated. Elbow extension strength (isometric; concentric and eccentric at 30, 90 and 180°·s−1) was measured using an isokinetic dynamometer to determine specific tension. Muscle volumes, ACSA, PCSA, muscle layer thickness and fascicle angles increased after training and their relative changes were similar, while muscle and fascicle length did not change. Muscle strength increased at all velocities; however, specific tension decreased after training. Increase in fascicle angles, which would be the result of increased Vm and PCSA, would seem to imply the occurrence of changes in muscle architecture. This might have given a negative effect on the force-generating properties of the muscles.

本文言語English
ページ(範囲)37-43
ページ数7
ジャーナルEuropean Journal of Applied Physiology and Occupational Physiology
72
1
DOI
出版ステータスPublished - 1995 1
外部発表はい

ASJC Scopus subject areas

  • 生理学
  • 公衆衛生学、環境および労働衛生

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