Muscle fiber and tendon length changes in the human vastus lateralis during slow pedaling

T. Muraoka, Y. Kawakami, M. Tachi, T. Fukunaga

研究成果: Article

42 被引用数 (Scopus)

抄録

Muscle fascicle lengths of vastus lateralis (VL) muscle were measured in five healthy men during slow pedaling to investigate the interaction between muscle fibers and tendon. Subjects cycled at a pedaling rate of 40 rpm (98 W). During exercise, fascicle lengths changed from 91 ± 7 (SE) to 127 ± 5 mm. It was suggested that fascicles were on the descending limb of their force-length relationship. The average shortening velocity of fascicle was greater than that of muscle-tendon complex in the first half of the knee extension phase and was less in the second half. The maximum shortening velocity of fascicle in the knee extension phase was less than that of muscle-tendon complex by 22 ± 9%. These discrepancies in velocities were mainly caused by the elongation of the tendinous tissue. It was suggested that the elasticity of VL tendinous tissue enabled VL fascicles to develop force at closer length to their optimal length and kept the maximum shortening velocity of VL fascicles low during slow pedaling.

本文言語English
ページ(範囲)2035-2040
ページ数6
ジャーナルJournal of Applied Physiology
91
5
DOI
出版ステータスPublished - 2001

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

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