Bone health, muscle properties and stretch-shortening cycle function of young and elderly males.
J Musculoskelet Neuronal Interact
; 19(4): 389-395, 2019 12 01.
Article
em En
| MEDLINE
| ID: mdl-31789290
ABSTRACT
The aim of this study was to examine bone, muscle, strength and stretch-shortening cycle (SSC) performance in young and elderly individuals with an ankle model to elucidate potential effects of ageing that have been suggested to influence fall risk. Moderately active young (n=10; age=22.3±1.3 yrs) and elderly (n=8; age=67.5±3.3 yrs) males completed a peripheral quantitative computed tomography scan on the dominant lower leg, maximal voluntary isometric plantarflexions (MVIP) and SSC tasks a countermovement hop and drop hops from three different heights. Bone stress-strain index at 14% of the lower leg and muscle density, muscle cross-sectional area and muscle+bone cross-sectional area at 66% of the lower leg were all significantly greater (p≤0.05) in younger males than elderly males. Younger males also had significantly greater rate of force development and peak force during the MVIP when compared to the elderly. Younger males achieved significantly higher forces, velocities and hop heights during all SSC tasks than elderly males. Such information provides support for greater specificity in exercise interventions that prevent lower leg morphological and functional decrements in the ageing population.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Envelhecimento
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Densidade Óssea
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Músculo Esquelético
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Força Muscular
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Contração Isométrica
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Movimento
Tipo de estudo:
Prognostic_studies
Limite:
Adult
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Aged
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Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article