期刊
ANNALS OF BEHAVIORAL MEDICINE
卷 30, 期 2, 页码 138-145出版社
OXFORD UNIV PRESS INC
DOI: 10.1207/s15324796abm3002_6
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Background: Physical activity has been effective in enhancing quality of life (QOL) of older adults over relatively short Periods of time. However little is known about the long-term effects of physical activity and even less about the possible mediators of this relationship. Purpose: We examined the mediating effects of psychological variables on the relationship between physical activity and global QOL (satisfaction with life) in older adults over a 4-year period. Methods: Participants (N = 174, M age = 66.7 years) completed a battery of psychosocial measures at I and 5 years following enrollment in a 6-month randomized controlled exercise trial. Results: Panel analysis conducted within a covariance modeling framework indicated that physical activity was related to self-efficacy, physical self-esteem, and positive affect at I year and in turn, greater levels of self-efficacy and positive affect were associated with higher levels of QOL. Analyses indicated that changes in physical activity over the 4-year period were related to increases in physical self-esteem and positive affect, but only positive affect directly influenced improvements in QOL. Conclusions: The findings lend support to the position that physical activity effects on QOL are in part mediated by intermediate psychological outcomes and that physical activity can have long-term effects on well-being.
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