Abstract:
BACKGROUND:Population-specific accelerometer cut-points are required to accurately determine the accumulation of physical activity of various intensities. OBJECTIVES:A calibration study was conducted (i) to determine the cut-points for the ActiGraph GT3X+, non-dominant, wrist-mounted accelerometer in children aged 8-12 years and (ii) to compare classification accuracies among the accelerometer's three axes and vector magnitude (VM) values. METHODS:Forty-five children aged 8-12 years performed up to seven activities while wearing accelerometers on their non-dominant wrist. Activities were performed in a summer day camp setting, represented free-living activities, and lasted for 10 min with minutes 5-8.5 used for analysis. Direct observation and percentage of heart rate reserve were used to determine activity intensity. RESULTS:Receiver operator characteristic (ROC) analyses resulted in area under the curve values of all three axes and VM ranging 0.82-0.89, 0.80-0.83, 0.62-0.67 and 0.86-0.89 for light, moderate, vigorous and moderate-to-vigorous activity intensities. Additionally, regression analyses resulted in prediction equations with R2 values ranging from 0.70 to 0.77. CONCLUSION:Results found comparable activity intensity classification accuracies from the ActiGraph GT3X+ wrist-worn accelerometer to previously published studies. Based on ROC and regression analyses, activity intensities can be distilled from this accelerometer using axis 1, axis 2 or VM values with similar classification accuracy.
journal_name
Pediatr Obesjournal_title
Pediatric obesityauthors
Chandler JL,Brazendale K,Beets MW,Mealing BAdoi
10.1111/ijpo.12033subject
Has Abstractpub_date
2016-04-01 00:00:00pages
120-7issue
2eissn
2047-6302issn
2047-6310journal_volume
11pub_type
杂志文章,多中心研究abstract:BACKGROUND:Maternal obesity increases offspring's obesity risk. However, studies have not often considered maternal metabolic and exercise patterns as well as paternal adiposity as potential covariates. OBJECTIVE:To assess the relationship between parental and newborn adiposity. METHODS:Participants were mother-child...
journal_title:Pediatric obesity
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journal_title:Pediatric obesity
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journal_title:Pediatric obesity
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journal_title:Pediatric obesity
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journal_title:Pediatric obesity
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journal_title:Pediatric obesity
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更新日期:2016-04-01 00:00:00
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更新日期:2017-02-01 00:00:00
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journal_title:Pediatric obesity
pub_type: 杂志文章
doi:10.1111/j.2047-6310.2012.00064.x
更新日期:2012-08-01 00:00:00
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journal_title:Pediatric obesity
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更新日期:2020-10-01 00:00:00
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journal_title:Pediatric obesity
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journal_title:Pediatric obesity
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更新日期:2017-06-01 00:00:00
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pub_type: 杂志文章,多中心研究
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journal_title:Pediatric obesity
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更新日期:2016-08-01 00:00:00