Evaluation of Actical equations and thresholds to predict physical activity intensity in young children

Janssen, Xanne, Cliff, Dylan, Reilly, John, Hinkley, Trina, Jones, Rachel, Batterham, Marijka, Ekelund, Uif, Brage, Soren and Okely, Tony 2014, Evaluation of Actical equations and thresholds to predict physical activity intensity in young children, Journal of sports sciences, vol. 33, no. 5, pp. 498-506, doi: 10.1080/02640414.2014.949826.

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Title Evaluation of Actical equations and thresholds to predict physical activity intensity in young children
Author(s) Janssen, Xanne
Cliff, Dylan
Reilly, John
Hinkley, TrinaORCID iD for Hinkley, Trina orcid.org/0000-0003-2742-8579
Jones, Rachel
Batterham, Marijka
Ekelund, Uif
Brage, Soren
Okely, Tony
Journal name Journal of sports sciences
Volume number 33
Issue number 5
Start page 498
End page 506
Total pages 9
Publisher Routledge
Place of publication Melbourne, Vic.
Publication date 2014-09-26
ISSN 0264-0414
Keyword(s) accelerometry
room calorimeter
Summary This study examined the validity of current Actical activity energy expenditure (AEE) equations and intensity cut-points in preschoolers using AEE and direct observation as criterion measures. Forty 4–6-year-olds (5.3 ± 1.0 years) completed a ~150-min room calorimeter protocol involving age-appropriate sedentary behaviours (SBs), light intensity physical activities (LPAs) and moderate-to-vigorous intensity physical activities (MVPAs). AEE and/or physical activity intensity were calculated using Actical equations and cut-points by Adolph, Evenson, Pfeiffer and Puyau. Predictive validity was examined using paired sample t-tests. Classification accuracy was evaluated using weighted kappas, sensitivity, specificity and area under the receiver operating characteristic curve. The Pfeiffer equation significantly overestimated AEE during SB and underestimated AEE during LPA (P < 0.0125 for both). There was no significant difference between measured and predicted AEEs during MVPA. The Adolph cut-point showed significantly higher accuracy for classifying SB, LPA and MVPA than all others. The available Actical equation does not provide accurate estimates of AEE across all intensities in preschoolers. However, the Pfeiffer equation performed reasonably well for MVPA. Using cut-points of ≤6 counts · 15 s−1, 7–286 counts · 15 s−1 and ≥ 287 counts · 15 s−1 when classifying SB, LPA and MVPA, respectively, is recommended.
Language eng
DOI 10.1080/02640414.2014.949826
Field of Research 110699 Human Movement and Sports Science not elsewhere classified
Socio Economic Objective 920501 Child Health
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2014, Taylor & Francis
Persistent URL http://hdl.handle.net/10536/DRO/DU:30068863

Document type: Journal Article
Collections: Faculty of Health
Institute for Physical Activity and Nutrition
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