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Sedentary Behavior in Preschoolers: How Many Days of Accelerometer Monitoring Is Needed?

Author

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  • Wonwoo Byun

    (Department of Health, Nutrition, and Exercise Sciences, Department of Public Health, North Dakota State University, Fargo, ND 58108, USA)

  • Michael W. Beets

    (Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA)

  • Russell R. Pate

    (Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA)

Abstract

The reliability of accelerometry for measuring sedentary behavior in preschoolers has not been determined, thus we determined how many days of accelerometry monitoring are necessary to reliably estimate daily time spent in sedentary behavior in preschoolers. In total, 191 and 150 preschoolers (three to five years) wore ActiGraph accelerometers (15-s epoch) during the in-school (≥4 days) and the total-day (≥6 days) period respectively. Accelerometry data were summarized as time spent in sedentary behavior (min/h) using three different cutpoints developed for preschool-age children (<37.5, <200, and <373 counts/15 s). The intraclass correlations (ICCs) and Spearman-Brown prophecy formula were used to estimate the reliability of accelerometer for measuring sedentary behavior. Across different cutpoints, the ICCs ranged from 0.81 to 0.92 for in-school sedentary behavior, and from 0.75 to 0.81 for total-day sedentary behavior, respectively. To achieve an ICC of ≥0.8, two to four days or six to nine days of monitoring were needed for in-school sedentary behavior and total-day sedentary behavior, respectively. These findings provide important guidance for future research on sedentary behavior in preschool children using accelerometry. Understanding the reliability of accelerometry will facilitate the conduct of research designed to inform policies and practices aimed at reducing sedentary behavior in preschool children.

Suggested Citation

  • Wonwoo Byun & Michael W. Beets & Russell R. Pate, 2015. "Sedentary Behavior in Preschoolers: How Many Days of Accelerometer Monitoring Is Needed?," IJERPH, MDPI, vol. 12(10), pages 1-14, October.
    • Handle: RePEc:gam:jijerp:v:12:y:2015:i:10:p:13148-13161:d:57410
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    References listed on IDEAS

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    1. Leigh M. Vanderloo & Patricia Tucker, 2015. "Weekly Trends in Preschoolers’ Physical Activity and Sedentary Time in Childcare," IJERPH, MDPI, vol. 12(3), pages 1-11, February.
    2. Leigh M. Vanderloo & Patricia Tucker & Andrew M. Johnson & Melissa M. Van Zandvoort & Shauna M. Burke & Jennifer D. Irwin, 2014. "The Influence of Centre-Based Childcare on Preschoolers’ Physical Activity Levels: A Cross-Sectional Study," IJERPH, MDPI, vol. 11(2), pages 1-9, February.
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    Cited by:

    1. Kaiseree I Dias & James White & Russell Jago & Greet Cardon & Rachel Davey & Kathleen F Janz & Russell R Pate & Jardena J Puder & John J Reilly & Ruth Kipping, 2019. "International Comparison of the Levels and Potential Correlates of Objectively Measured Sedentary Time and Physical Activity among Three-to-Four-Year-Old Children," IJERPH, MDPI, vol. 16(11), pages 1-16, May.
    2. Russell R. Pate & Rod K. Dishman & Marsha Dowda & Kerry L. McIver & Karin A. Pfeiffer & Dwayne E. Porter & Ruth P. Saunders & Dianne S. Ward, 2022. "A Summary of One Research Team’s Contributions to Understanding Physical Activity Behavior in Children and Youth," IJERPH, MDPI, vol. 19(21), pages 1-23, October.

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