Associations of sedentary behavior and physical activity with older adults' physical function: an isotemporal substitution approach
- Yasunaga, A
- Shibata, A
- Ishii, K
- Koohsari, MJ
- Inoue, S
- Sugiyama, T
- Owen, N
- Oka, K
DOIAbstract
BACKGROUNDS: The purpose of this study was to examine, in a sample of Japanese older adults, the associations of objectively-assessed sedentary behavior (SB) and physical activity (PA) with performance-based physical function. The isotemporal substitution (IS) approach was used to model simultaneously the effects of the specific activity being performed and the activity being displaced, in an equal time-exchange manner. METHODS: Among 287 older adults (65-84 years), we used accelerometers to identify the daily average time spent on SB (≤1.5 METs); light-intensity PA (LIPA) (>1.5 to <3.0 METs); and moderate- to vigorous-intensity PA (MVPA) (≥3.0 METs). Physical function was assessed using five performance-based measures: hand grip strength, ...
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