Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Influence of static stretching on viscoelastic properties of human tendon structures in vivo
Autore:
Kubo, K; Kanehisa, H; 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: 2, volume: 90, anno: 2001,
pagine: 520 - 527
SICI:
8750-7587(200102)90:2<520:IOSSOV>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN HAMSTRING MUSCLE; MECHANICAL-PROPERTIES; IN-VIVO; ISOMETRIC CONTRACTIONS; HIP-JOINT; PERFORMANCE; APONEUROSIS; RESPONSES; STIFFNESS; EXERCISES;
Keywords:
medial gastrocnemius muscle; stiffness; hysteresis; flexibility;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Kubo, K 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 Tokyo 1538902, Japan
Citazione:
K. Kubo et al., "Influence of static stretching on viscoelastic properties of human tendon structures in vivo", J APP PHYSL, 90(2), 2001, pp. 520-527

Abstract

The purpose of this study was to investigate the influences of static stretching on the viscoelastic properties of human tendon structures in vivo. Seven male subjects performed static stretching in which the ankle was passively flexed to 35 degrees of dorsiflexion and remained stationary for 10 min. Before and after the stretching, the elongation of the tendon and aponeurosis of medial gastrocnemius muscle (MG) was directly measured by ultrasonography while the subjects performed ramp isometric plantar flexion up to the maximum voluntary contraction (MVC), followed by a ramp relaxation. The relationship between the estimated muscle force (Fm) of MG and tendon elongation (L) during the ascending phase was fitted to a linear regression, theslope of which was defined as stiffness of the tendon structures. The percentage of the area within the Fm-L loop to the area beneath the curve during the ascending phase was calculated as an index representing hysteresis. Stretching produced no significant change in MVC but significantly decreasedstiffness and hysteresis from 22.9 +/- 5.8 to 20.6 +/- 4.6 N/mm and from 20.6 +/- 8.8 to 13.5 +/- 7.6%, respectively. The present results suggest that stretching decreased the viscosity of tendon structures but increased theelasticity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 09:06:01