Validation of activPAL defined sedentary time and breaks in sedentary dime in 4- to 6-year-olds

Xanne Janssen, Dylan P. Cliff, John J. Reilly, Trina Hinkley, Rachel A. Jones, Marijka Batterham, Ulf Ekelund, Søren Brage, Anthony D. Okely

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

This study examined the classification accuracy of the activPAL, including total time spent sedentary and total number of breaks in sedentary behavior (SB) in 4- to 6-year-old children. Forty children aged 4-6 years (5.3 ± 1.0 years) completed a ~150-min laboratory protocol involving sedentary, light, and moderate- to vigorous-intensity activities. Posture was coded as sit/lie, stand, walk, or other using direct observation. Posture was classified using the activPAL software. Classification accuracy was evaluated using sensitivity, specificity and area under the receiver operating characteristic curve (ROC-AUC). Time spent in each posture and total number of breaks in SB were compared using paired sample t-tests. The activPAL showed good classification accuracy for sitting (ROC-AUC = 0.84) and fair classification accuracy for standing and walking (0.76 and 0.73, respectively). Time spent in sit/lie and stand was overestimated by 5.9% (95% CI = 0.6-11.1%) and 14.8% (11.6-17.9%), respectively; walking was underestimated by 10.0% (-12.9-7.0%). Total number of breaks in SB were significantly overestimated (55 ± 27 over the course of the protocol; p < .01). The activPAL performed well when classifying postures in young children. However, the activPAL has difficulty classifying other postures, such as kneeling. In addition, when predicting time spent in different postures and total number of breaks in SB the activPAL appeared not to be accurate.

LanguageEnglish
Pages110-117
Number of pages8
JournalPediatric Exercise Science
Volume26
Issue number1
DOIs
Publication statusPublished - Feb 2014

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Posture
ROC Curve
Walking
Area Under Curve
Software
Observation
Light
Sensitivity and Specificity

Keywords

  • accelerometry
  • preschoolers
  • posture allocation

Cite this

Janssen, Xanne ; Cliff, Dylan P. ; Reilly, John J. ; Hinkley, Trina ; Jones, Rachel A. ; Batterham, Marijka ; Ekelund, Ulf ; Brage, Søren ; Okely, Anthony D. / Validation of activPAL defined sedentary time and breaks in sedentary dime in 4- to 6-year-olds. In: Pediatric Exercise Science. 2014 ; Vol. 26, No. 1. pp. 110-117.
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Janssen, X, Cliff, DP, Reilly, JJ, Hinkley, T, Jones, RA, Batterham, M, Ekelund, U, Brage, S & Okely, AD 2014, 'Validation of activPAL defined sedentary time and breaks in sedentary dime in 4- to 6-year-olds' Pediatric Exercise Science, vol. 26, no. 1, pp. 110-117. https://doi.org/10.1123/pes.2013-0106

Validation of activPAL defined sedentary time and breaks in sedentary dime in 4- to 6-year-olds. / Janssen, Xanne; Cliff, Dylan P.; Reilly, John J.; Hinkley, Trina; Jones, Rachel A.; Batterham, Marijka; Ekelund, Ulf; Brage, Søren; Okely, Anthony D.

In: Pediatric Exercise Science, Vol. 26, No. 1, 02.2014, p. 110-117.

Research output: Contribution to journalArticle

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AU - Jones, Rachel A.

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AU - Brage, Søren

AU - Okely, Anthony D.

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