title: Prospective associations of objectively assessed physical activity at different intensities with subjective well-being in older adults.
abstract: This study aimed to examine the longitudinal independent associations of objectively assessed physical activity at different intensities, including moderate-to-vigorous physical activity, light physical activity, and sedentary behaviors, with dimensions of subjective well-being in older adults.
  
  
  
  A total of 307 community-dwelling older adults aged 65 or older in Taiwan were interviewed in 2012. Physical activity was assessed using triaxial accelerometry. Subjective well-being was measured using the Chinese Aging Well Profile. Among them, 295 attended an 18-month follow-up study in 2013. Hierarchical linear regression models with adjustment for socio-demographic variables, lifestyle behaviors, health status, accelerometer wear time, and state of well-being at baseline were performed.
  
  
  
  The hierarchical regression models (step one) demonstrated that moderate-to-vigorous physical activity was associated with higher levels of follow-up general and specific dimensions of well-being (β = 0.19-0.24) with the exception of material and environmental well-being. After light physical activity was further included in the models (step two), the associations of moderate-to-vigorous physical activity with general, physical, and independence well-being remained, while the contribution of light physical activity was not significant. In contrast, light physical activity was a significant predictor of psychological, learning and growth, and social well-being in these models (β = 0.20-0.24), while these associations with moderate-to-vigorous physical activity were attenuated or not significant. Sedentary time was not related to any dimension of well-being.
  
  
  
  The findings indicate that moderate-to-vigorous physical activity and light physical activity are associated with different dimensions of well-being, suggesting that different intensities of late-life physical activity make distinct contributions to well-being.
authors.affiliation: Graduate Institute of Sports and Health, National Changhua University of Education, Changhua, Taiwan.|Department of Epidemiology and Public Health, University College London, London, UK.
authors.forename: Po-Wen
authors.initials: PW
authors.lastname: Ku
authors.affiliation: Centre for Exercise, Nutrition and Health Sciences, University of Bristol, Bristol, UK.
authors.forename: Kenneth R
authors.initials: KR
authors.lastname: Fox
authors.affiliation: Department of Health Promotion and Health Education, National Taiwan Normal University, Taipei, Taiwan.
authors.forename: Yung
authors.initials: Y
authors.lastname: Liao
authors.affiliation: Family Medicine Department, Taipei City Hospital Zhongxing Branch, Taipei, Taiwan.
authors.forename: Wen-Jung
authors.initials: WJ
authors.lastname: Sun
authors.affiliation: Department of Epidemiology and Public Health, University College London, London, UK. ljchen@ntupes.edu.tw.|Department of Exercise Health Science, National Taiwan University of Sport, Taichung, Taiwan. ljchen@ntupes.edu.tw.
authors.forename: Li-Jung
authors.initials: LJ
authors.lastname: Chen
mesh_terms: D061725:Accelerometry / Q000379:methods*; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging; D015444:Exercise / Q000523:psychology*; D005260:Female; D006304:Health Status; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D011446:Prospective Studies; D011788:Quality of Life / Q000523:psychology*; D057185:Sedentary Behavior
keywords: Accelerometry; Aging; Light intensity; Quality of life; Sedentary