Background: Although higher psychological well-being has been linked with a range of positive biological processes and health outcomes, the prospective association between psychological well-being and physical activity among older adults has been understudied.

Purpose: We tested whether higher baseline psychological well-being predicted higher levels of physical activity over time.

Methods: Prospective data were from the English Longitudinal Study of Aging, a nationally representative sample of English adults over the age of 50. Our sample included 9986 adults who were assessed up to six times across an average of 11 years.

Results: After adjusting for sociodemographic factors, each standard deviation increase in baseline psychological well-being was associated with higher median physical activity in linear regression models that examined physical activity across all six waves (β = 0.20; 95% confidence interval [CI] 0.18-0.21) and in linear mixed effect models that examined repeated measures of physical activity over the entire follow-up period (β = 0.20; 95% CI 0.19-0.21). Further, higher baseline psychological well-being was associated with a slower rate of decline in physical activity among people who were active at baseline (hazard ratio [HR] = 0.79, 95% CI 0.76-0.82) and increasing physical activity among people who were inactive at baseline (HR = 1.28, 95% CI 1.22-1.35). Findings were maintained after adjusting for baseline health status and depression.

Conclusions: Psychological well-being was independently associated with attaining and maintaining higher physical activity levels over 11 years, suggesting that it may be a valuable target for interventions aimed at helping older adults acquire more physical activity.

Keywords: Epidemiology; Exercise; Health psychology; Physical activity; Psychological well-being.