Cited by 428Physical Activity and HealthContext-Aware Activity Recognition SystemsSleep and related disorders

Evaluation of raw acceleration sedentary thresholds in children and adults

Hildebrand, Maria, Hansen, Bjørge H., van Hees, Vincent T., Ekelund, Ulf·2017·Scandinavian Journal of Medicine & Science in Sports

Abstract

The aim was to develop sedentary (sitting/lying) thresholds from hip and wrist worn raw tri-axial acceleration data from the ActiGraph and GENEActiv, and to examine the agreement between free-living time spent below these thresholds with sedentary time estimated by the activPAL. Sixty children and adults wore an ActiGraph and GENEActiv on the hip and wrist while performing six structured activities, before wearing the monitors, in addition to an activPAL, for 24 h. Receiver operating characteristic (ROC) curves were used to determine sedentary thresholds based on activities in the laboratory. Agreement between developed sedentary thresholds during free-living and activPAL were assessed by Bland-Altman plots and by calculating sensitivity and specificity. Using laboratory data and ROC-curves showed similar classification accuracy for wrist and hip thresholds (Area under the curve = 0.84-0.92). Greatest sensitivity (97-98%) and specificity (74-78%) were observed for the wrist thresholds, with no large differences between brands. During free-living, Bland-Altman plots showed large mean individual biases and 95% limits of agreement compared with activPAL, with smallest difference for the ActiGraph wrist threshold in children (+30 min, P = 0.3). Sensitivity and specificity for the developed thresholds during free-living were low for both age groups and for wrist (Sensitivity, 68-88%, Specificity, 46-59%) and hip placements (Sensitivity, 89-97%, Specificity, 26-34%). Laboratory derived sedentary thresholds generally overestimate free-living sedentary time compared with activPAL. Wrist thresholds appear to perform better than hip thresholds for estimating free-living sedentary time in children and adults relative to activPAL, however, specificity for all the developed thresholds are low.

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Crossref · 10.1111/sms.12795

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Authors
Hildebrand, M., Hansen, B. H., van Hees, V. T., & Ekelund, U.
Affiliations
  • Norwegian School of Sport Sciences (NO)
  • Netherlands eScience Center Amsterdam The Netherlands
Corresponding author
Hildebrand, Maria
Venue
Scandinavian Journal of Medicine & Science in Sports
Publisher
Wiley
Published
2016-11-22
Volume
27
Issue
12
Pages
1814-1823
ISSN
  • 0905-7188 (ISSN-L)
  • 1600-0838
OpenAlex
W2552428245
Cited by
425
References
35
Citations by year
2026: 61 · 2025: 66 · 2024: 70 · 2023: 48 · 2022: 55 · 2021: 39 · 2020: 40 · 2019: 27 · 2018: 13 · 2017: 5
FWCI
12.08
Type
journal article
Language
en
Open access
closed
Locations
  • Scandinavian Journal of Medicine and Science in Sports (publishedVersion)
  • PubMed (publishedVersion)
Funders
Norwegian School of Sport Sciences
Topics
  • Health Sciences › Medicine › Physiology › Physical Activity and Health
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Context-Aware Activity Recognition Systems
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Keywords
sedentary behavior, hip-worn accelerometers, wrist-worn accelerometers, ActiGraph, GENEActiv, activPAL, children, adults
MeSH terms
Fitness Trackers, Adult, Child, Female, Hip, Humans, Male, Middle Aged, Norway, Reference Values, ROC Curve, Sensitivity and Specificity, Wrist, Young Adult, Sedentary Behavior, Accelerometry

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