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

BMC Geriatrics

Research Article

Takemi Sugiyama¹  Neville Owen²  Shigeru Inoue³  Ai Shibata⁴  Akitomo Yasunaga⁵  Kaori Ishii⁶  Koichiro Oka⁶  Mohammad Javad Koohsari⁷ 

[1] Behavioural Epidemiology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia;Institute for Health & Aging, Australian Catholic University, Melbourne, Australia;Swinburne University of Technology, Melbourne, Australia;Behavioural Epidemiology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia;Swinburne University of Technology, Melbourne, Australia;Department of Preventive Medicine and Public Health, Tokyo Medical University, Tokyo, Japan;Faculty Health and Sport Sciences, University of Tsukuba, Tsukuba, Japan;Faculty of Liberal Arts and Sciences, Bunka Gakuen University, 3-22-1 Yoyogi, Shibuya-ku, 151-8523, Tokyo, Japan;Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan;Faculty of Sport Sciences, Waseda University, Tokorozawa, Japan;Behavioural Epidemiology Laboratory, Baker Heart and Diabetes Institute, Melbourne, Australia;Institute for Health & Aging, Australian Catholic University, Melbourne, Australia;

关键词: Accelerometer;    Active behaviors;    Functional test;    Mobility;    Sitting;   

DOI  :  10.1186/s12877-017-0675-1

 received in 2017-08-22, accepted in 2017-11-23,  发布年份 2017

来源: Springer

【 摘 要 】

BackgroundsThe 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.MethodsAmong 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, usual and maximum gait speeds, timed up and go, and one-legged stance with eyes open. We employed three linear regression models – a single-activity model, a partition model, and an IS model – to assess the associations of SB, LIPA, and MVPA with each of the five measures of physical function.ResultsThere were significant positive associations in the single-activity and partition models between MVPA and the measures of physical function (with the exception of hand grip strength). The IS models found that replacing SB or LIPA with MVPA was significantly and favorably associated with physical function measures.ConclusionsThese findings indicate that replacing small amounts of SB and LIPA with MVPA (such as 10 min) may contribute to improvements in older adults’ physical function.

【 授权许可】

CC BY   
© The Author(s). 2017