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Titolo:
Muscle fiber and tendon length changes in the human vastus lateralis during slow pedaling
Autore:
Muraoka, T; Kawakami, Y; Tachi, M; Fukunaga, T;
Indirizzi:
Univ Tokyo, Grad Sch Arts & Sci, Dept Life Sci, Lab Sports Sci,Meguro Ku, Tokyo 1538902, Japan Univ Tokyo Tokyo Japan 1538902 ports Sci,Meguro Ku, Tokyo 1538902, Japan
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 5, volume: 91, anno: 2001,
pagine: 2035 - 2040
SICI:
8750-7587(2001)91:5<2035:MFATLC>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
IN-VIVO; MECHANICAL-PROPERTIES; TRICEPS SURAE; GASTROCNEMIUS-MUSCLE; LOWER-EXTREMITY; MOMENT ARM; STRETCH; KNEE; CONTRACTION; APONEUROSIS;
Keywords:
tendon elasticity; force-length relationship; ultrasonography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Fukunaga, T Univ Tokyo, Grad Sch Arts & Sci, Dept Life Sci, Lab Sports Sci,Meguro Ku, Tokyo 1538902, Japan Univ Tokyo Tokyo Japan 1538902 guro Ku, Tokyo 1538902, Japan
Citazione:
T. Muraoka et al., "Muscle fiber and tendon length changes in the human vastus lateralis during slow pedaling", J APP PHYSL, 91(5), 2001, pp. 2035-2040

Abstract

Muscle fascicle lengths of vastus lateralis (VL) muscle were measured in five healthy men during slow pedaling to investigate the interaction betweenmuscle fibers and tendon. Subjects cycled at a pedaling rate of 40 rpm (98W). During exercise, fascicle lengths changed from 91 +/- 7 (SE) to 127 +/- 5 mm. It was suggested that fascicles were on the descending limb of their force-length relationship. The average shortening velocity of fascicle was greater than that of muscle-tendon complex in the first half of the knee extension phase and was less in the second half. The maximum shortening velocity of fascicle in the knee extension phase was less than that of muscle-tendon complex by 22 +/- 9%. These discrepancies in velocities were mainly caused by the elongation of the tendinous tissue. It was suggested that theelasticity of VL tendinous tissue enabled VL fascicles to develop force atcloser length to their optimal length and kept the maximum shortening velocity of VL fascicles low during slow pedaling.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 06:47:53