Relationship between muscle architecture and joint performance during concentric contractions in humans

Taku Wakahara, Hiroaki Kanehisa, Yasuo Kawakami, Tetsuo Fukunaga, Toshimasa Yanai

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The purpose of this study was to examine the relationship between muscle architecture of the triceps brachii (TB) and joint performance during concentric elbow extensions. Twenty-two men performed maximal isometric and concentric elbow extensions against various loads. Joint torque and angular velocity during concentric contractions were measured, and joint power was calculated. Muscle length, cross-sectional areas, and volume of TB were measured from magnetic resonance images. Pennation angle (PA) of TB at rest was determined by ultrasonography. The PA was significantly correlated with the maximal isometric torque (r = .471), but not to the torque normalized by muscle volume (r = .312). A significant correlation was found between PA and the angular velocity at 0 kg load (r = .563), even when the angular velocity was normalized by the muscle length (r = .536). The PA was significantly correlated with the maximal joint power (r = .519), but not with the power normalized by muscle volume (r = .393). These results suggest that PA has a positive influence on the muscle shortening velocity during an unloaded movement, but does not have a significant influence on the maximum power generation in untrained men.

Original languageEnglish
Pages (from-to)405-412
Number of pages8
JournalJournal of Applied Biomechanics
Volume29
Issue number4
Publication statusPublished - 2013 Aug

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Keywords

  • Joint angular velocity
  • Joint power
  • Muscle volume
  • Pennation angle

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Biophysics
  • Rehabilitation

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