Cohort study for determinants of physical decline in older adults

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It is well-known that physical decline is caused by aging and sedentary lifestyle, however factors which induce sedentary lifestyle are still unclear. We investigated relationships of physical activity of community-dwelling older adults with transportation modes, psychological statuses, social networks, and neighborhood environments. Our results reveal that 1) social networks are directly related, and are indirectly related with physical activity through a reduction of psychological distress ; 2) frequency of going out by bicycle and by motor vehicle are positively linked with physical activity ; and 3) environmental characteristics would be more important for engaging in leisure-time physical activity except walking than for exercising by walking alone.