Concentric and eccentric muscle strength before, during and after fatigue in 13 year-old boys

Y. Kawakami*, H. Kanehisa, S. Ikegawa, T. Fukunaga

*この研究の対応する著者

研究成果: Article査読

29 被引用数 (Scopus)

抄録

The purpose of this study was to investigate the force-producing characteristics of boys aged 13 years in relation to fatigue of elbow flexor muscles. Maximal voluntary force in elbow flexion was measured before and after a muscle endurance test (MET) by using an isokinetic dynamometer isometrically, concentrically and eccentrically at three velocities, i.e. 0.21, 0.52, and 1.05 rad · s-1. The MET consisted of maximal concentric and eccentric muscle actions performed alternately at 0.52 rad · s-1 for 50 consecutive trials. Muscle cross-sectional area (CSA) of elbow flexor muscles (biceps brachii and brachialis) was measured by a B-mode ultrasound apparatus. Although eccentric force showed significantly higher values than concentric force during MET, there was no significant difference in the rate of decline in force between the two actions. There was no significant difference in the rate of decline in force after MET for each velocity and muscle action. Isometric, concentric and eccentric force before MET was significantly related to muscle CSA whereas, after MET, concentric force significantly correlated with muscle CSA but there was no significant correlation between muscle CSA and isometric or eccentric force. From our study, it is therefore suggested that in development to maturity, isometric, concentric and eccentric force decrease at the same rate with advancing muscle fatigue; however, there might be differences among muscle actions in facors affecting force development.

本文言語English
ページ(範囲)121-124
ページ数4
ジャーナルEuropean Journal of Applied Physiology and Occupational Physiology
67
2
DOI
出版ステータスPublished - 1993 8 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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