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Pattern Analysis of Sedentary Behavior Change after a Walking Intervention

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Objectives: We examined the pattern of change in sedentary behavior (SB) resulting from a physical activity (PA) intervention in older adults, and the influence of sex on changes in SB. Methods: One hundred twenty (N = 120) inactive older adults from 2 12-week step/day-target interventions were included in this pooled reanalysis. Participants were randomly assigned to an intervention (STEP) or control group (CON). A Hip-worn accelerometer (Actigraph) was used to assess SB and PA. Results: Significant decreases in SB (-25 minutes) were largely accounted for by the increase in moderate- to vigorous-intensity PA (MVPA; +17.3 minutes). More broadly, data showed that for every 1% increase in proportion of time spent in MVPA, SB decreased by 1.21%. Results of the pattern analysis showed significant pre-post decreases in the number of daily sedentary bouts lasting 10, 20, and 30 minutes and the number of sit-to-stand transitions in the STEP group. Males tended to decrease time spent in longer bouts and females tended to decrease the number of sit-to-stand transitions to achieve lower SB. Conclusions: Decreases in SB were accomplished through reductions in shorter bouts of SB and likely through a variety of small changes that differed between individual participants and sexes.
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Document Type: Research Article

Affiliations: 1: Professor, Department of Kinesiology, University of Wisconsin-Milwaukee, Milwaukee, WI;, Email: [email protected] 2: Biostatistician, Center for Aging and Translational Research, University of Wisconsin-Milwaukee, Milwaukee, WI 3: Post-doctoral Fellow, Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 4: Associate Professor, Department of Medicine, Division of Cardiology, Medical College of Wisconsin, Milwaukee, WI 5: Professor, Department of Kinesiology, University of Wisconsin-Milwaukee, Milwaukee, WI

Publication date: 01 May 2018

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  • The American Journal of Health Behavior seeks to improve the quality of life through multidisciplinary health efforts in fostering a better understanding of the multidimensional nature of both individuals and social systems as they relate to health behaviors.

    The Journal aims to provide a comprehensive understanding of the impact of personal attributes, personality characteristics, behavior patterns, social structure, and processes on health maintenance, health restoration, and health improvement; to disseminate knowledge of holistic, multidisciplinary approaches to designing and implementing effective health programs; and to showcase health behavior analysis skills that have been proven to affect health improvement and recovery.

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