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Article

Comparison of a Wearable Tracker with Actigraph for Classifying Physical Activity Intensity and Heart Rate in Children

1
Graduate School of Education, Yongin Univerisity, 134 Yongindaehak-ro, cheoin-gu, Yongin-si 449-714, Korea
2
Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, VA 23284, USA
3
Department of Health, Kinesiology, and Recreation, University of Utah, 250 S 1850 E (HPER North), Room 205, Salt Lake City, UT 84108, USA
4
Department of Physical Education, College of Physical Education, Kyung Hee University, 1732 Deogyeong-daero, Giheung-Gu, Yongin-si 17104, Korea
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2019, 16(15), 2663; https://doi.org/10.3390/ijerph16152663
Submission received: 30 April 2019 / Revised: 19 July 2019 / Accepted: 22 July 2019 / Published: 25 July 2019

Abstract

Introduction: To examine the validity and reliability of the Fitbit Charge HR (FCH), wrist-worn ActiGraph (AG) accelerometers were used for assessing the classification of physical activity (PA) into intensity categories in children. Methods: Forty-three children (n = 43) participated in the study. Each participant completed 3 min bouts of 12 PAs ranging from sedentary to vigorous intensity while simultaneously wearing FCH and AG on both hands, a Polar HR monitor, and a portable indirect calorimeter. Total time spent in different PA intensity levels measured by FCH and AG were compared to the indirect calorimetry. Results: The highest classification accuracy values of sedentary behavior was 81.1% for FCH. The highest classification (72.4%) of light intensity PA was observed with Crouter’s algorithm from the non-dominant wrist. Crouter’s algorithm also show the highest classification (81.8%) for assessing moderate to vigorous intensity PA compared to FCH (70.8%). Across the devices, a high degree of reliability was found in step measurements, ranging from an intra-class correlation (ICC) = 0.92 to an ICC = 0.94. The reliability of the AG and the FCH showed high agreement for each variable. Conclusion: The FCH shows better validity for estimating sedentary behavior and similar validity for assessing moderate to vigorous PA compared to the research-grade monitor. Across the devices, the reliability showed the strongest association.
Keywords: accelerometer; Fitbit; physical activity classification accelerometer; Fitbit; physical activity classification

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MDPI and ACS Style

Kang, S.; Kim, Y.; Byun, W.; Suk, J.; Lee, J.-M. Comparison of a Wearable Tracker with Actigraph for Classifying Physical Activity Intensity and Heart Rate in Children. Int. J. Environ. Res. Public Health 2019, 16, 2663. https://doi.org/10.3390/ijerph16152663

AMA Style

Kang S, Kim Y, Byun W, Suk J, Lee J-M. Comparison of a Wearable Tracker with Actigraph for Classifying Physical Activity Intensity and Heart Rate in Children. International Journal of Environmental Research and Public Health. 2019; 16(15):2663. https://doi.org/10.3390/ijerph16152663

Chicago/Turabian Style

Kang, Seoungki, Youngdeok Kim, Wonwoo Byun, JinSu Suk, and Jung-Min Lee. 2019. "Comparison of a Wearable Tracker with Actigraph for Classifying Physical Activity Intensity and Heart Rate in Children" International Journal of Environmental Research and Public Health 16, no. 15: 2663. https://doi.org/10.3390/ijerph16152663

APA Style

Kang, S., Kim, Y., Byun, W., Suk, J., & Lee, J.-M. (2019). Comparison of a Wearable Tracker with Actigraph for Classifying Physical Activity Intensity and Heart Rate in Children. International Journal of Environmental Research and Public Health, 16(15), 2663. https://doi.org/10.3390/ijerph16152663

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