The Feasibility of Reducing and Measuring Sedentary Time among Overweight, Non-Exercising Office Workers

This study examined the feasibility of reducing free-living sedentary time (ST) and the convergent validity of various tools to measure ST. Twenty overweight/obese participants wore the activPAL (AP) (criterion measure) and ActiGraph (AG; 100 and 150 count/minute cut-points) for a 7-day baseline per...

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Main Authors: Sarah Kozey-Keadle, Amanda Libertine, John Staudenmayer, Patty Freedson
Format: Article
Language:English
Published: Wiley 2012-01-01
Series:Journal of Obesity
Online Access:http://dx.doi.org/10.1155/2012/282303
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author Sarah Kozey-Keadle
Amanda Libertine
John Staudenmayer
Patty Freedson
author_facet Sarah Kozey-Keadle
Amanda Libertine
John Staudenmayer
Patty Freedson
author_sort Sarah Kozey-Keadle
collection DOAJ
description This study examined the feasibility of reducing free-living sedentary time (ST) and the convergent validity of various tools to measure ST. Twenty overweight/obese participants wore the activPAL (AP) (criterion measure) and ActiGraph (AG; 100 and 150 count/minute cut-points) for a 7-day baseline period. Next, they received a simple intervention targeting free-living ST reductions (7-day intervention period). ST was measured using two questionnaires following each period. ST significantly decreased from 67% of wear time (baseline period) to 62.7% of wear time (intervention period) according to AP (n = 14, P<0.01). No other measurement tool detected a reduction in ST. The AG measures were more accurate (lower bias) and more precise (smaller confidence intervals) than the questionnaires. Participants reduced ST by ~5%, which is equivalent to a 48_min reduction over a 16-hour waking day. These data describe ST measurement properties from wearable monitors and self-report tools to inform sample-size estimates for future ST interventions.
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spelling doaj-art-8aaea127659e4783937747bbad7783392025-02-03T05:51:37ZengWileyJournal of Obesity2090-07082090-07162012-01-01201210.1155/2012/282303282303The Feasibility of Reducing and Measuring Sedentary Time among Overweight, Non-Exercising Office WorkersSarah Kozey-Keadle0Amanda Libertine1John Staudenmayer2Patty Freedson3Department of Kinesiology, University of Massachusetts, Amherst, MA 01003, USADepartment of Kinesiology, University of Massachusetts, Amherst, MA 01003, USADepartment of Mathematics and Statistics, University of Massachusetts, Amherst, MA 01003, USADepartment of Kinesiology, University of Massachusetts, Amherst, MA 01003, USAThis study examined the feasibility of reducing free-living sedentary time (ST) and the convergent validity of various tools to measure ST. Twenty overweight/obese participants wore the activPAL (AP) (criterion measure) and ActiGraph (AG; 100 and 150 count/minute cut-points) for a 7-day baseline period. Next, they received a simple intervention targeting free-living ST reductions (7-day intervention period). ST was measured using two questionnaires following each period. ST significantly decreased from 67% of wear time (baseline period) to 62.7% of wear time (intervention period) according to AP (n = 14, P<0.01). No other measurement tool detected a reduction in ST. The AG measures were more accurate (lower bias) and more precise (smaller confidence intervals) than the questionnaires. Participants reduced ST by ~5%, which is equivalent to a 48_min reduction over a 16-hour waking day. These data describe ST measurement properties from wearable monitors and self-report tools to inform sample-size estimates for future ST interventions.http://dx.doi.org/10.1155/2012/282303
spellingShingle Sarah Kozey-Keadle
Amanda Libertine
John Staudenmayer
Patty Freedson
The Feasibility of Reducing and Measuring Sedentary Time among Overweight, Non-Exercising Office Workers
Journal of Obesity
title The Feasibility of Reducing and Measuring Sedentary Time among Overweight, Non-Exercising Office Workers
title_full The Feasibility of Reducing and Measuring Sedentary Time among Overweight, Non-Exercising Office Workers
title_fullStr The Feasibility of Reducing and Measuring Sedentary Time among Overweight, Non-Exercising Office Workers
title_full_unstemmed The Feasibility of Reducing and Measuring Sedentary Time among Overweight, Non-Exercising Office Workers
title_short The Feasibility of Reducing and Measuring Sedentary Time among Overweight, Non-Exercising Office Workers
title_sort feasibility of reducing and measuring sedentary time among overweight non exercising office workers
url http://dx.doi.org/10.1155/2012/282303
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