Effects of age on muscle as measured by electrical impedance myography.
Physiol Meas
; 27(10): 953-9, 2006 Oct.
Article
em En
| MEDLINE
| ID: mdl-16951455
ABSTRACT
Electrical impedance myography (EIM) is a painless and non-invasive technique for the assessment of muscle which we apply here to the effects of normal aging. The paper presents a cross-sectional analysis of EIM data from the quadriceps and tibialis anterior of 100 healthy subjects (44 men, 56 women, ages 18-90 years). The principal EIM parameter, the spatially averaged phase theta(avg), shows a roughly quadratic reduction with increasing age, declining more steeply beyond 60 years. The correlation was stronger in men (quadriceps r2 = 0.68 for men, 0.52 for women; tibialis anterior r2 = 0.74 for men, 0.38 for women; p < 0.001 throughout). Additionally, four subjects (age greater than 75 years) were asked to return for repeat testing several years after their initial assessment. These longitudinal results qualitatively confirm the cross-sectional data, though with greater reductions in theta(avg) at high age. The findings of this study support the potential use of EIM as a simple and effort-independent test of muscle health in the elderly.
Buscar no Google
Base de dados:
MEDLINE
Assunto principal:
Envelhecimento
/
Músculo Quadríceps
Idioma:
En
Ano de publicação:
2006
Tipo de documento:
Article