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Associations of monitor-assessed activity with performance-based physical function

Reid, Natasha, Daly, Robin M, Winkler, Elisabeth A, Gardiner, Paul A, Eakin, Elizabeth G, Owen, Neville, Dunstan, David W and Healy, Genevieve N 2016, Associations of monitor-assessed activity with performance-based physical function, PLoS one, vol. 11, no. 4, pp. 1-14, doi: 10.1371/journal.pone.0153398.

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Title Associations of monitor-assessed activity with performance-based physical function
Author(s) Reid, Natasha
Daly, Robin MORCID iD for Daly, Robin M orcid.org/0000-0002-9897-1598
Winkler, Elisabeth A
Gardiner, Paul A
Eakin, Elizabeth G
Owen, Neville
Dunstan, David W
Healy, Genevieve N
Journal name PLoS one
Volume number 11
Issue number 4
Article ID e0153398
Start page 1
End page 14
Total pages 14
Publisher Public Libray of Science
Place of publication San Francisco, Calif.
Publication date 2016-04-13
ISSN 1932-6203
Keyword(s) Adult Aged
Aged, 80 and over
Australia Cross-Sectional Studies Exercise
Physiology
Physiologic motor activity
Sedentary lifestyle
Summary The purpose of this study was to investigate the cross-sectional associations of monitor-derived measures of sedentary time and physical activity with performance-based physical function in healthy Australian adults. Data from 602 participants (mean age 58.1±10.0 years; 58% female) from the 2011/12 wave of the Australian Diabetes, Obesity and Lifestyle (AusDiab3) study were analyzed. The thigh-worn activPAL3™ monitor (7-days continuous wear) was used to derive time during waking hours spent: sitting/reclining; standing; and, stepping (overall, and separately as light [<3 METs] and moderate-to-vigorous physical activity [MVPA; ≥3 METs]), and number of sit-stand transitions. Associations of these (in hours/day, or 15 transitions/day) with physical function measures (8ft Timed Up and Go [TUG-8; log-transformed seconds] and Knee Extensor Strength [KES; kg]) were tested via linear regression, adjusting for confounders. Interactions by sex and age-category (<45; 45–54; 55–64; ≥65 years) were tested. In all participants, KES was significantly (p<0.05) associated with stepping and MVPA stepping only; none of the activity measures were associated with TUG-8. However, subgroup analysis revealed that in older adults (≥65 years), TUG-8 was associated with stepping and MVPA stepping (both p<0.05). All associations with sitting time, standing, sit-stand transition and sex interactions were not statistically significant. In summary, sitting time was not significantly associated with impaired muscle strength or gait/mobility in Australian adults aged 36–80 years, but light- to moderate activity (stepping) was positively associated with muscle strength, and gait/mobility in older adults aged ≥65 years. The direction of causation is not known and remains important to investigate considering the high prevalence of both poor function and limited activity in older age.
Language eng
DOI 10.1371/journal.pone.0153398
Field of Research MD Multidisciplinary
Socio Economic Objective 0 Not Applicable
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2016, Reid et al
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30086832

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.