The influence of fascicle behavior on the lack of velocity dependence in eccentric joint torque in humans

in Vivo observation

Kentaro Chino, Naotoshi Mitsukawa, Kai Kobayashi, Yusuke Miyoshi, Toshiaki Oda, Hiroaki Kanehisa, Tetsuo Fukunaga, Senshi Fukashiro, Yasuo Kawakami

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

To investigate the relationship between fascicle behavior and joint torque, the fascicle behavior of the triceps surae during isometric and eccentric (30 and 60 deg/s) plantar flexion by maximal voluntary and submaximal electrical activation (MVA and SEA) was measured by real-time ultrasonography. Eccentric torque at 30 and 60 deg/s was significantly higher than isometric torque under SEA, but not under MVA. However, fascicle length did not significantly differ between isometric and eccentric trials under either condition. Therefore, the difference in developed torque by MVA and SEA cannot be explained by fascicle behavior. Under both MVA and SEA conditions, eccentric torque at 30 and 60 deg/s was equivalent. Similarly, fascicle lengthening velocities at 30 and 60deg/s did not show any significant difference. Such fascicle behavior can be attributed to the influence of tendinous tissue and pennation angle, and lead to a lack of increase in eccentric torque with increasing angular velocity.

Original languageEnglish
Pages (from-to)111-118
Number of pages8
JournalJournal of Applied Biomechanics
Volume25
Issue number2
Publication statusPublished - 2009 May

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Torque
Joints
Observation
Ultrasonography

Keywords

  • Force-velocity relationship
  • Forcelength relationship
  • Gastrocnemius and soleus muscles
  • Tendinous tissues

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Biophysics
  • Rehabilitation

Cite this

The influence of fascicle behavior on the lack of velocity dependence in eccentric joint torque in humans : in Vivo observation. / Chino, Kentaro; Mitsukawa, Naotoshi; Kobayashi, Kai; Miyoshi, Yusuke; Oda, Toshiaki; Kanehisa, Hiroaki; Fukunaga, Tetsuo; Fukashiro, Senshi; Kawakami, Yasuo.

In: Journal of Applied Biomechanics, Vol. 25, No. 2, 05.2009, p. 111-118.

Research output: Contribution to journalArticle

Chino, K, Mitsukawa, N, Kobayashi, K, Miyoshi, Y, Oda, T, Kanehisa, H, Fukunaga, T, Fukashiro, S & Kawakami, Y 2009, 'The influence of fascicle behavior on the lack of velocity dependence in eccentric joint torque in humans: in Vivo observation', Journal of Applied Biomechanics, vol. 25, no. 2, pp. 111-118.
Chino, Kentaro ; Mitsukawa, Naotoshi ; Kobayashi, Kai ; Miyoshi, Yusuke ; Oda, Toshiaki ; Kanehisa, Hiroaki ; Fukunaga, Tetsuo ; Fukashiro, Senshi ; Kawakami, Yasuo. / The influence of fascicle behavior on the lack of velocity dependence in eccentric joint torque in humans : in Vivo observation. In: Journal of Applied Biomechanics. 2009 ; Vol. 25, No. 2. pp. 111-118.
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