| Validation of Uniaxial and Triaxial Accelerometers for the Assessment of Physical Activity in Preschool Children. | |
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MedLine Citation:
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PMID: 22207582 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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PURPOSE: Given the unique physical activity (PA) patterns of preschoolers, wearable electronic devices for quantitative assessment of physical activity require validation in this population. Study objective was to validate uniaxial and triaxial accelerometers in preschoolers. METHODS: Room calorimetry was performed over 3 hours in 64 preschoolers, wearing Actical, Actiheart and RT3 accelerometers during play, slow, moderate and fast translocation. Based on activity energy expenditure (AEE) and accelerometer counts, optimal thresholds for PA levels were determined by piecewise linear regression and discrimination boundary analysis. RESULTS: Established HR cutoffs in preschoolers for sedentary/light, light/moderate and moderate/vigorous levels were used to define AEE (0.015, 0.054, 0.076 kcal.kg-1.min-1) and physical activity ratio (PAR) (1.6, 2.9, 3.6) thresholds, and accelerometer thresholds. True positive predictive rates were 77%, 75% and 76% for sedentary; 63%, 61% and 65% for light; 34%, 52% and 49% for moderate; 46%, 46% and 49% for vigorous levels. Due to low positive predictive rates, we combined moderate and vigorous PA. Classification accuracy was improved overall and for the combined moderate-vigorous PA level (69%, 82%, 79%) for Actical, Actiheart and RT3, respectively. CONCLUSION: Uniaxial and triaxial accelerometers are acceptable devices with similar classification accuracy for sedentary, light and moderate-vigorous levels of PA in preschoolers. |
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Authors:
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Anne L Adolph; Maurice R Puyau; Firoz A Vohra; Theresa A Nicklas; Issa F Zakeri; Nancy F Butte |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-27 |
Journal Detail:
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Title: Journal of physical activity & health Volume: - ISSN: 1543-5474 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101189457 Medline TA: J Phys Act Health Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Dept of Pediatrics, USDA/ARS Children's Nutrition Research Center, Baylor College of Medicine, Houston, TX. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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