Day-level sedentary pattern estimates derived from hip-worn accelerometer cut-points in 8-12-year-olds: Do they reflect postural transitions?

Document Type

Article

Publication Date

8-2019

Identifier

DOI: 10.1080/02640414.2019.1605646; PMCID: PMC6594870

Abstract

Improving sedentary measurement is critical to understanding sedentary-health associations in youth. This study assessed agreement between the thigh-worn activPAL and commonly used hip-worn ActiGraph accelerometer methods for assessing sedentary patterns in children. Both devices were worn by 8-12-year-olds (N = 195) for 4.6 ± 1.9 days. Two ActiGraph cut-points were applied to two epoch durations: ≤25 counts (c)/15 s, ≤75c/15s, ≤100c/60s, and ≤300c/60s. Bias, mean absolute deviation (MAD), and intraclass correlation coefficients (ICCs) tested agreement between devices for total sedentary time and 11 sedentary pattern variables (usual bout duration, sedentary time accumulated in various bout durations, breaks/day, break rate, and alpha). For most sedentary pattern variables, ActiGraph 25c/15s, 75c/15s, and 100c/60s had poor ICCs, with bias and MAD >20%. ActiGraph 300c/60s had a better agreement than the other cut-points, but all ICCs were

Journal Title

Journal of sports sciences

Volume

37

Issue

16

First Page

1899

Last Page

1909

MeSH Keywords

Actigraphy; Child; Equipment Design; Female; Fitness Trackers; Hip; Humans; Male; Posture; Reproducibility of Results; Sedentary Behavior; Thigh

Keywords

Accelerometry; children; sitting; validity

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