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

Journal of Obesity - Tập 2012 - Trang 1-10 - 2012
Sarah Kozey Keadle1, Amanda Libertine1, John Staudenmayer2, Patty S. Freedson1
1Department of Kinesiology, University of Massachusetts, Amherst, MA 01003, USA
2Department of Mathematics and Statistics University of Massachusetts Amherst, MA 01003 USA

Tóm tắt

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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Thông tin xuất bản

Journal of Obesity

Tập 2012

1-10

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