Influence of elastic properties of tendon structures on jump performance in humans

Keitaro Kubo, Yasuo Kawakami, Tetsuo Fukunaga

Research output: Contribution to journalArticlepeer-review

213 Citations (Scopus)

Abstract

The purpose of this study was to quantify the elastic properties of tendon structures in vivo and to investigate the influence of the tendon properties on jump performance with and without countermovement. Elongation of the tendon and aponeurosis of vastus lateralis muscle (dL) was directly measured by ultrasonography while subjects (n = 31) performed ramp isometric knee extension up to the voluntary maximum (MVC). The relationship between muscle force and dL was fitted to a linear regression above 50% MVC, the slope of which was defined as stiffness of the tendon structures. Statistical analysis revealed no significant difference between duplicated measurements of stiffness, with an interday reliability of r = 0.88 and a coefficient of variance of 6.1%. Although the stiffness was not significantly related to absolute jump height in either vertical jump, it was inversely correlated with the difference in jump height between the vertical jumps performed with and without countermovement. The results suggested that the stiffness of tendon structures has a favorable effect on stretch-shortening cycle exercise, possibly due to adequate storage and recoil of elastic energy.

Original languageEnglish
Pages (from-to)2090-2096
Number of pages7
JournalJournal of Applied Physiology
Volume87
Issue number6
DOIs
Publication statusPublished - 1999 Dec
Externally publishedYes

Keywords

  • In vivo measurement
  • Stiffness
  • Stretch-shortening cycle exercise
  • Ultrasonography
  • Vastus lateralis muscle

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

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