This study quantified and compared the cross-sectional and longitudinal influence of age, self-report physical activity (SR-PA), and body composition (% fat) on the decline of maximal aerobic power (VO2peak) of women.
The cross-sectional sample consisted of 409 healthy women, ages 20-64 yr.
The 43 women of the longitudinal sample were from the same population and examined twice, the mean time between tests was 3.7 (±2.2) yr.
Peak oxygen uptake was determined by indirect calorimetry during a maximal treadmill test.
The zero-order correlation of - 0.742 between VO2peak and% fat was significantly (P<0.05) higher then the SR-PA (r=0.626) and age correlations (r=-0.633).
Linear regression defined the cross-sectional age-related decline in VO2peak at 0.537 ml. kg-1. min-1. yr-1.
Multiple regression analysis (R=0.851) showed that adding% fat and SR-PA and their interaction to the regression model reduced the age regression weight of - 0.537, to - 0.265 ml. kg-1. min-1. yr-1.
Statistically controlling for time differences between tests, general linear models analysis showed that longitudinal changes in aerobic power were due to independent changes in% fat and SR-PA, confirming the cross-sectional results.
These findings are consistent with men's data from the same lab showing that about 50% of the cross-sectional age-related decline in VOpeak was due to% fat and SR-PA.
Mots-clés Pascal : Sénescence, Epidémiologie, Consommation oxygène maximum, Composition corporelle, Exercice physique, Homme, Femelle
Mots-clés Pascal anglais : Senescence, Epidemiology, Maximum oxygen consumption, Body composition, Physical exercise, Human, Female
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0421468
Code Inist : 002A24. Création : 10/04/1997.