Differences between young and older women in maximal force, force fluctuations, and surface EMG during isometric knee extension and elbow flexion.

Abstract:

:The loss of muscle strength with aging appears to be greater in the lower than upper limbs, but strength and its neural control have never been compared in the same population of individuals in both upper and lower limbs. The aim of this study was to investigate differences between eight young (20-31 years) and eight older (68-76 years) healthy women in maximal voluntary contraction (MVC), force fluctuations, median frequency (MDF) of the surface electromyogram (sEMG), and muscle fiber conduction velocity (MFCV) during sustained isometric elbow flexion (EF) and knee extension (KE), performed at moderate to high force intensity. Older women showed larger fluctuations of force with endurance and changes in sEMG pointing to less fatigue, especially at high level of force, with no differences between upper and lower extremities. This may have significant implications in the design of rehabilitation programs directed to this population.

journal_name

Muscle Nerve

journal_title

Muscle & nerve

authors

Bazzucchi I,Felici F,Macaluso A,De Vito G

doi

10.1002/mus.20151

subject

Has Abstract

pub_date

2004-11-01 00:00:00

pages

626-35

issue

5

eissn

0148-639X

issn

1097-4598

journal_volume

30

pub_type

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