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Validity and compar...
Validity and comparability of a wrist-worn accelerometer in children.
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- Ekblom, Örjan, 1971- (author)
- Gymnastik- och idrottshögskolan,Björn Ekbloms forskningsgrupp
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- Nyberg, Gisela (author)
- Karolinska Institutet
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- Ekblom Bak, Elin (author)
- Gymnastik- och idrottshögskolan,Björn Ekbloms forskningsgrupp
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- Ekelund, Ulf (author)
- Cambridge University,MRC Epidemiology
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- Marcus, Claude (author)
- Karolinska Institutet
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(creator_code:org_t)
- Human Kinetics, 2012
- 2012
- English.
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In: Journal of Physical Activity and Health. - : Human Kinetics. - 1543-3080 .- 1543-5474. ; 9:3, s. 389-393
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http://www.ncbi.nlm....
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https://urn.kb.se/re...
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http://kipublication...
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https://doi.org/10.1...
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Abstract
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- BACKGROUND:Wrist-worn accelerometers may provide an alternative to hip-worn monitors for assessing physical activity as they are easier to wear and may thus facilitate long-term recordings. The current study aimed at a) assessing the validity of the Actiwatch (wrist-worn) for estimating energy expenditure, b) determining cut-off values for light, moderate, and vigorous activities, c) studying the comparability between the Actiwatch and the Actigraph (hip-worn), and d) assessing reliability.METHODS:For validity, indirect calorimetry was used as criterion measure. ROC-analyses were applied to identify cut-off values. Comparability was tested by simultaneously wearing of the 2 accelerometers during free-living condition. Reliability was tested in a mechanical shaker.RESULTS:All-over correlation between accelerometer output and energy expenditure were found to be 0.80 (P < .001).Based on ROC-analysis, cut-off values for 1.5, 3, and 6 METs were found to be 80, 262, and 406 counts per 15 s, respectively. Energy expenditure estimates differed between the Actiwatch and the Actigraph (P < .05). The intra- and interinstrument coefficient of variation of the Actiwatch ranged between 0.72% and 8.4%.CONCLUSION:The wrist-worn Actiwatch appears to be valid and reliable for estimating energy expenditure and physical activity intensity in children aged 8 to 10 years.
Keyword
- Medicin/Teknik
- Medicine/Technology
Publication and Content Type
- ref (subject category)
- art (subject category)
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