Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Influence of elastic properties of tendon structures on jump performance in humans
Autore:
Kubo, K; Kawakami, Y; Fukunaga, T;
Indirizzi:
Univ Tokyo, Dept Life Sci Sports Sci, Meguro Ku, Tokyo 1538902, Japan UnivTokyo Tokyo Japan 1538902 orts Sci, Meguro Ku, Tokyo 1538902, Japan
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 6, volume: 87, anno: 1999,
pagine: 2090 - 2096
SICI:
8750-7587(199912)87:6<2090:IOEPOT>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
VASTUS LATERALIS MUSCLE; IN-VIVO; EXTENSOR MUSCLES; STIFFNESS; ENERGY; FORCE; ARCHITECTURE; CONTRACTION; STRAIN; REFLEX;
Keywords:
vastus lateralis muscle; stiffness; ultrasonography; in vivo measurement; stretch-shortening cycle exercise;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Fukunaga, T Univ Tokyo, Dept Life Sci Sports Sci, Meguro Ku, Komaba 3-8-1,Tokyo 1538902, Japan Univ Tokyo Komaba 3-8-1 Tokyo Japan 1538902 yo 1538902, Japan
Citazione:
K. Kubo et al., "Influence of elastic properties of tendon structures on jump performance in humans", J APP PHYSL, 87(6), 1999, pp. 2090-2096

Abstract

The purpose of this study was to quantify the elastic properties of tendonstructures 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 withthe 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.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 02:24:09