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Agreement between Fitbit and ActiGraph Estimates of Physical Activity in Young Children.
- Source :
- Measurement in Physical Education & Exercise Science; Apr-Jun2023, Vol. 27 Issue 2, p171-180, 10p, 4 Charts
- Publication Year :
- 2023
-
Abstract
- Physical activity (PA) estimates from the Fitbit Flex 2 were compared to those from the ActiGraph GT9X Link in 123 elementary school children. Steps and intensity-specific estimates of PA and 3-month PA change were calculated using two different ActiGraph cut-points (Evenson and Romanzini). Fitbit estimates were 35% higher for steps compared to the ActiGraph. Fitbit and ActiGraph intensity-specific estimates were closest for sedentary and light PA, while estimates of moderate and vigorous PA varied substantially depending upon the ActiGraph cut-points used. Spearman correlations between device estimates were higher for steps (r<subscript>s</subscript> =.70) than for moderate (r<subscript>s</subscript> =.54 to.55) or vigorous (r<subscript>s</subscript> =.29 to.48) PA. There was low concordance between devices in assessing PA changes over time. Agreement between Fitbit Flex 2 and ActiGraph estimates may depend upon the cut-points used to classify PA intensity. However, there is fair to good agreement between devices in ranking children's steps and MVPA. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1091367X
- Volume :
- 27
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Measurement in Physical Education & Exercise Science
- Publication Type :
- Academic Journal
- Accession number :
- 162939712
- Full Text :
- https://doi.org/10.1080/1091367X.2022.2125319