Journal article

Associations of sedentary behavior and physical activity with older adults' physical function: an isotemporal substitution approach

Akitomo Yasunaga, Ai Shibata, Kaori Ishii, Mohammad Javad Koohsari, Shigeru Inoue, Takemi Sugiyama, Neville Owen, Koichiro Oka

BMC GERIATRICS | BMC | Published : 2017

Abstract

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 fiv..

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Grants

Awarded by JSPS KAKENHI


Awarded by MEXT


Awarded by Japan Society for the Promotion of Science


Awarded by Grants-in-Aid for Scientific Research


Funding Acknowledgements

This work was supported by JSPS KAKENHI Grant (15 K01534 and 15K01647) and MEXT-Supported Program for the Strategic Research Foundation at Private Universities (S1511017). Koohsari was supported by the JSPS Postdoctoral Fellowship for Research in Japan (#17716) from the Japan Society for the Promotion of Science. The sponsor had no role in the study design, methods, subject recruitment, data collections, analysis and preparation of paper.