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Trajectories of objectively measured physical activity in free-living older men.

Jefferis, BJ; Sartini, C; Ash, S; Lennon, LT; Wannamethee, SG; Lee, IM; Whincup, PH (2015) Trajectories of objectively measured physical activity in free-living older men. Medicine and Science in Sports and Exercise, 47 (2). pp. 343-349. ISSN 1530-0315 https://doi.org/10.1249/MSS.0000000000000410
SGUL Authors: Whincup, Peter Hynes

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Abstract

BACKGROUND: The steep decline in physical activity (PA) among the oldest old is not well understood; there is little information about the patterns of change in PA and sedentary behaviour (SB) in older people. Longitudinal data on objectively measured PA data can give insights about how PA and SB change with age. METHODS: Men age 70-90 yr, from a United Kingdom population-based cohort wore a GT3X accelerometer over the hip annually on up to three occasions (56%, 50%, and 51% response rates) spanning 2 yr. Multilevel models were used to estimate change in activity. Men were grouped according to achieving ≥150 min·wk of MVPA in bouts of ≥10 min (current guidelines) at two or three time points. RESULTS: A total of 1419 ambulatory men had ≥600 min wear time on ≥3 d at ≥2 time points. At baseline, men took 4806 steps per day and spent 72.5% of their day in SB, 23.1% in light PA, and 4.1% in moderate-to-vigorous PA (MVPA). Mean change per year was -341 steps, +1.1% SB, -0.7% light PA, and -0.4% MVPA each day (all P < 0.001). A total of 76.3% (n = 1083) never met guidelines ("stable low"), 7.9% (n = 112) consistently met guidelines ("stable high"), 8.2% (n = 116) stopped meeting guidelines by the last occasion ("decreasers"), and 4.9% (n = 69) started meeting guidelines by the last occasion ("increasers"). "Decreasers" spent 69.3% of each day in SB at baseline, which increased by 2% per year (P < 0.005), light activity remained at 23.3% (change, -0.2% per year; P = 0.4), and total MVPA decreased from 7.1% by -1.7% per year, (P < 0.001). The number of sedentary bouts >30 min increased from 5.1 by 0.1 per year (P = 0.02). CONCLUSIONS: Among older adults, the steep decline in total PA occurred because of reductions in MVPA, while light PA is relatively spared and sedentary time and long sedentary bouts increase.

Item Type: Article
Additional Information: © 2014 by the American College of Sports Medicine. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License, where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially. http://creativecommons.org/licenses/by-nc-nd/3.0.
Keywords: OLDER ADULTS, PHYSICAL ACTIVITY, SEDENTARY BEHAVIOR, ACCELEROMETER, COHORT STUDY, Sport Sciences, 1106 Human Movement And Sports Science
SGUL Research Institute / Research Centre: Academic Structure > Population Health Research Institute (INPH)
Journal or Publication Title: Medicine and Science in Sports and Exercise
ISSN: 1530-0315
Language: eng
Dates:
DateEvent
February 2015Published
Projects:
Project IDFunderFunder ID
CA154647NCI NIH HHSUNSPECIFIED
PDF-2010-03-23Department of HealthUNSPECIFIED
PG/09/024/26857British Heart FoundationUNSPECIFIED
R01 CA154647NCI NIH HHSUNSPECIFIED
RG/08/013/25942British Heart FoundationUNSPECIFIED
RG/08/013/25942British Heart FoundationUNSPECIFIED
PubMed ID: 24988411
Web of Science ID: WOS:000348100800016
Go to PubMed abstract
URI: https://openaccess.sgul.ac.uk/id/eprint/107370
Publisher's version: https://doi.org/10.1249/MSS.0000000000000410

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