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Titolo:
AGE AND GENDER COMPARISONS OF MUSCLE STRENGTH IN 654 WOMEN AND MEN AGED 20-93 YR
Autore:
LINDLE RS; METTER EJ; LYNCH NA; FLEG JL; FOZARD JL; TOBIN J; ROY TA; HURLEY BF;
Indirizzi:
UNIV MARYLAND,DEPT KINESIOL,COLL HLTH & HUMAN PERFORMANCE COLLEGE PK MD 20742 UNIV MARYLAND,DEPT KINESIOL,COLL HLTH & HUMAN PERFORMANCE COLLEGE PK MD 20742 NIA,GERONTOL RES CTR,NIH BALTIMORE MD 21224
Titolo Testata:
Journal of applied physiology
fascicolo: 5, volume: 83, anno: 1997,
pagine: 1581 - 1587
SICI:
8750-7587(1997)83:5<1581:AAGCOM>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
STRETCH-SHORTENING CYCLE; QUADRICEPS MUSCLES; PLANTAR FLEXION; KNEE EXTENSION; YOUNG; TORQUE; FEMALES; ENERGY; MALES; ELBOW;
Keywords:
ECCENTRIC STRENGTH; GENDER DIFFERENCES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
R.S. Lindle et al., "AGE AND GENDER COMPARISONS OF MUSCLE STRENGTH IN 654 WOMEN AND MEN AGED 20-93 YR", Journal of applied physiology, 83(5), 1997, pp. 1581-1587

Abstract

To assess age and gender differences in muscle strength, isometric, concentric (Con), and eccentric (Ecc) peak torque was measured in the knee extensors at a slow (0.52 rad/s) and fast (3.14 rad/s) velocity in654 subjects (346 men and 308 women, aged 20-93 yr) from the Baltimore Longitudinal Study of Aging. Regression analysis revealed significant (P < 0.001) age-related reductions in Con and Ecc peak torque for men and women at both velocities, but no differences were observed between the gender groups or velocities. Age explained losses in Con betterthan Ecc peak torque, accounting for 30% (Con) vs. 19% (Ecc) of the variance in men and 28% (Con) vs. 11% (Ecc) in women. To assess age andgender differences in the ability to store and utilize elastic energy, the stretch-shortening cycle was determined in a subset of subjects (it = 47). The older women (mean age = 70 yr) showed a significantly greater enhancement in the stretch-shortening cycle, compared with men of similar age (P < 0.01) and compared with younger men and women (each P < 0.05). Both men and women showed significant declines in muscle quality for Con peak torque (P < 0.01), but no gender differences wereobserved. Only the men showed a significant decline in muscle quality(P < 0.001) for Ecc peak: torque. Thus both men and women experience age-related losses in isometric, Con, and Ecc knee extensor peak torque; however, age accounted for less of the variance in Ecc peak torque in women, and women tend to better preserve muscle quality with age for Ecc peak torque. In addition, older women have an enhanced capacity to store and utilize elastic energy compared with similarly aged men as well as with younger women and men.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/08/20 alle ore 09:01:28