The health benefits of physical activity are believed to be related more to exercise volume than to intensity.
In this 24-wk study, we examined the effect of walking volume on aerobic fitness, serum lipids, and body composition in women post-menopause, a population at risk for coronary artery disease.
Of 79 women randomly assigned to groups at the outset, 56 completed the study (mean age 61.3 ± 5.8).
Participants walked at an intensity of 60% peak oxygen uptake (VO2peak) for 60 min, 3 d. wk-1 (N=19) or 5 d. wk-1 (N=17), or remained sedentary (N=20).
Walking 3 or 5 d. wk-1 increased VO2peak (ml. kg-1. min-1) by 12% and 14%, respectively (P<0.01).
There were no changes in serum lipids in response to either program.
Percent body fat decreased by 1.1% and 1.3% in those walking 3 and 5 d. wk-1, respectively ; both changes significantly different from the control group (P<0.05).
Walking 5 d. wk-1 did not result in more health benefits than 3 d. wk-1. possibly due to a greater compensatory decline in activities other than the walking program, or greater discrepancies between actual and reported activity and food intake.
Longer-duration programs, or simultaneous changes in diet, may be necessary to alter serum lipids in nonobese, normo-lipidemic women post-menopause.
Mots-clés Pascal : Postménopause, Marche à pied, Durée, Intensité, Aptitude physique, Composition corporelle, Exercice physique, Locomotion, Homme, Femelle
Mots-clés Pascal anglais : Postmenopause, Walking, Duration, Intensity, Physical fitness, Body composition, Physical exercise, Locomotion, Human, Female
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0439550
Code Inist : 002A24. Création : 10/04/1997.