Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Contraction-specific differences in maximal muscle power during stretch-shortening cycle movements in elderly males and females
Autore:
Caserotti, P; Aagaard, P; Simonsen, EB; Puggaard, L;
Indirizzi:
Odense Univ, Univ So Denmark, Inst Sports Sci & Clin Biomech, Odense, Denmark Odense Univ Odense Denmark t Sports Sci & Clin Biomech, Odense, Denmark Univ Copenhagen, Bispebjerg Hosp, Sports Med Res Unit, Team Denmark Test Ctr, Copenhagen, Denmark Univ Copenhagen Copenhagen Denmark enmark Test Ctr, Copenhagen, Denmark Univ Copenhagen, Panum Inst, Inst Med Anat, DK-2200 Copenhagen, Denmark Univ Copenhagen Copenhagen Denmark DK-2200 , DK-2200 Copenhagen, Denmark
Titolo Testata:
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 3, volume: 84, anno: 2001,
pagine: 206 - 212
SICI:
1439-6319(200103)84:3<206:CDIMMP>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
LEG EXTENSOR MUSCLES; PHYSICAL-ACTIVITY; ELASTIC ENERGY; KNEE EXTENSION; WOMEN; MEN; STRENGTH; AGE; PERFORMANCE; GENDER;
Keywords:
aging; muscle power; stretch-shortening cycle; eccentric muscle actions; concentric contractions;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Puggaard, L Odense Univ, Univ So Denmark, Inst Sports Sci & Clin Biomech, Odense, Denmark Odense Univ Odense Denmark & Clin Biomech, Odense, Denmark
Citazione:
P. Caserotti et al., "Contraction-specific differences in maximal muscle power during stretch-shortening cycle movements in elderly males and females", EUR J A PHY, 84(3), 2001, pp. 206-212

Abstract

Elderly people (age 75 years; n = 48 males and 34 females) were studied inorder to elucidate gender differences in elderly subjects on the determinants of muscle power (force and velocity) during a stretch-shortening cycle. All subjects performed three maximal counter-movement vertical jumps usingboth legs, on a force platform (Kistler 9281 B). The eccentric (Ep) and concentric (Cp) phases of the jumps were analyzed. The Ep was further dividedinto an acceleration phase (Ep(acc): from the start of the downward movement to the maximal negative velocity) and deceleration phase (EPdec: from the maximal negative velocity to the end of the downward movement). Jump height for the men was higher than for the women (P < 0.001). During both Ep(acc) and Ep(dec) no significant differences were observed between males and females in force and power generation. However, the men had a higher peak muscle power during the Cp, which may be explained exclusively by the velocity determinant (P < 0.001). No specific gender-related strategy appeared to influence the motor pattern of the movement. The comparable eccentric forcegeneration of the leg extensors in both genders suggests a similar abilityto cope with eccentric muscle actions during everyday activities. In contrast, the marked lower capacity for concentric contractions in women may result in an impaired performance, especially in activities where intense and rapid movements are essential, for example when reversing a forward fall. This may be one reason why elderly women are more prone to falls than are elderly men.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/01/20 alle ore 13:28:18