Eccentric Strength Is Preserved With Age in Women

Lindle, R. S.; Metter, E. J.; Fozard, James L.; Fleg, J. L.; Hurley, Ben F.

doi:10.1249/00005768-199505001-01145

Cited by 1 publication

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“…The studies available suggest that Ecc strength in humans may be less affected by age than is Con strength (15, 27, 27a, 28, 32), particularly at higher velocities (15,28). Additionally, in a preliminary study (22), we observed a gender difference in the age-associated change in Ecc strength. However, the results of gender difference with age are conflicting (15, 27, 27a, 28, 32), and these studies have used relatively small sample sizes and limited age ranges (15, 27, 27a, 28, 32).…”

Section: Eccentric Strength; Gender Differencesmentioning

confidence: 57%

“…It has been postulated that changes in neural, muscular, and mechanical and/or elastic properties of muscle might contribute to a maintenance of Ecc strength with age (7,8,15,28,32). We studied the mechanical and elastic properties in the present investigation because these factors have been previously connected to a possible gender difference in Ecc strength decline with age (18), which was indicated from our preliminary findings (22). It is well established in young populations that Con peak torque is enhanced when preceded by an Ecc exertion, i.e., the SSC (10,13,18,30).…”

Section: Discussionmentioning

confidence: 88%

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Age and gender comparisons of muscle strength in 654 women and men aged 20–93 yr

Lindle

Metter

Lynch

et al. 1997

Journal of Applied Physiology

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797

556

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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 in 654 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 better than 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 and gender differences in the ability to store and utilize elastic energy, the stretch-shortening cycle was determined in a subset of subjects (n = 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 were observed. 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.

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Section: Eccentric Strength; Gender Differencesmentioning

confidence: 57%