Recreational Physical Activity in Postmenopausal Women is Stable Over 8-Years of Follow-Up.

Publication Type:

Journal Article

Source:

Journal of physical activity & health (2012)

Keywords:

October 2012, Public Health Sciences Division

Abstract:

BACKGROUND. The goals of this study were to examine: (1) longitudinal trajectories of energy expenditure from recreational physical activity (PA) in post-menopausal women, (2) whether women who belong to different PA trajectories engage in different types of PA, and (3) whether baseline socio-demographic, health, psychosocial, and lifestyle characteristics predict membership in PA trajectories. METHODS. Women from the Women's Health Initiative Observational Study with baseline PA data (n=92,629) were included. Physical activity, measured via self-report six times over eight years, was converted to MET hr/wk for analysis. Latent growth curve mixture models and latent profile models were used to analyze longitudinal PA trajectories and cross-sectional PA composition, respectively. RESULTS. Three distinct, stable PA trajectories (highly, moderately, and minimally active) were identified with nearly 75% of the women classified as minimally active (<8 MET-hr/wk). The majority of women who were at least moderately active engaged in a balanced combination of walking, moderate, and vigorous PA. Socio-demographic characteristics such as income, education, and past vigorous PA were predictive of PA trajectory, as were some health status indicators, e.g. body mass index, but not health related quality of life. CONCLUSIONS. Self-reported PA is largely stable across nearly a decade of follow-up in post-menopausal women.