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- Publisher Website: 10.1016/j.jpeds.2018.03.057
- Scopus: eid_2-s2.0-85046627164
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Article: The Use of a Fitbit Device for Assessing Physical Activity and Sedentary Behavior in Preschoolers
Title | The Use of a Fitbit Device for Assessing Physical Activity and Sedentary Behavior in Preschoolers |
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Authors | |
Keywords | accelerometer children preschool |
Issue Date | 2018 |
Citation | Journal of Pediatrics, 2018, v. 199, p. 35-40 How to Cite? |
Abstract | © 2018 Elsevier Inc. Objective: To determine the accuracy of the Fitbit Flex (FF) activity monitor for assessing preschoolers’ physical activity (PA) and sedentary behavior (SED) in free-living conditions. Study design: This is a cross-sectional study of 27 preschoolers (41% girls; age, 4.9 years) who each wore the FF and ActiGraph GT3X+ (AG) simultaneously for 24 hours. Raw data from each device were temporally matched and summarized into estimates of SED, moderate-to-vigorous PA, and total PA after removing sleep and nonwear time periods. Equivalence testing was performed to compare the 90% CIs of the estimates from the FF with the respective equivalence zone (±15% of the mean estimates) from the AG. Results: The FF yielded equivalent estimates of SED (mean difference, 42-71 minutes/day) and total PA (mean difference, 42-70 minutes/day), but lower moderate-to-vigorous PA (mean difference, 29-67 minutes/day) than the AG, on average. The FF showed strong correlations and relatively low mean absolute percent errors (MAPEs) in relation to the AG for SED (r = 0.87; MAPE = 9.1%) and total PA (r = 0.71; MAPE = 14.3%), but a moderate correlation and high MAPE for moderate-to-vigorous PA (r = 0.59; MAPE = 70.1%). Conclusions: The FF activity monitor accurately estimated the amount of time spent in SED and overall PA in preschool-aged children, but with an underestimation of moderate-to-vigorous PA. Our findings support the use of the FF as a feasible and a relatively accurate PA monitoring tool in clinical and research settings. |
Persistent Identifier | http://hdl.handle.net/10722/267088 |
ISSN | 2023 Impact Factor: 3.9 2023 SCImago Journal Rankings: 1.043 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Byun, Wonwoo | - |
dc.contributor.author | Kim, Youngwon | - |
dc.contributor.author | Brusseau, Timothy A. | - |
dc.date.accessioned | 2019-01-31T07:20:29Z | - |
dc.date.available | 2019-01-31T07:20:29Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Journal of Pediatrics, 2018, v. 199, p. 35-40 | - |
dc.identifier.issn | 0022-3476 | - |
dc.identifier.uri | http://hdl.handle.net/10722/267088 | - |
dc.description.abstract | © 2018 Elsevier Inc. Objective: To determine the accuracy of the Fitbit Flex (FF) activity monitor for assessing preschoolers’ physical activity (PA) and sedentary behavior (SED) in free-living conditions. Study design: This is a cross-sectional study of 27 preschoolers (41% girls; age, 4.9 years) who each wore the FF and ActiGraph GT3X+ (AG) simultaneously for 24 hours. Raw data from each device were temporally matched and summarized into estimates of SED, moderate-to-vigorous PA, and total PA after removing sleep and nonwear time periods. Equivalence testing was performed to compare the 90% CIs of the estimates from the FF with the respective equivalence zone (±15% of the mean estimates) from the AG. Results: The FF yielded equivalent estimates of SED (mean difference, 42-71 minutes/day) and total PA (mean difference, 42-70 minutes/day), but lower moderate-to-vigorous PA (mean difference, 29-67 minutes/day) than the AG, on average. The FF showed strong correlations and relatively low mean absolute percent errors (MAPEs) in relation to the AG for SED (r = 0.87; MAPE = 9.1%) and total PA (r = 0.71; MAPE = 14.3%), but a moderate correlation and high MAPE for moderate-to-vigorous PA (r = 0.59; MAPE = 70.1%). Conclusions: The FF activity monitor accurately estimated the amount of time spent in SED and overall PA in preschool-aged children, but with an underestimation of moderate-to-vigorous PA. Our findings support the use of the FF as a feasible and a relatively accurate PA monitoring tool in clinical and research settings. | - |
dc.language | eng | - |
dc.relation.ispartof | Journal of Pediatrics | - |
dc.subject | accelerometer | - |
dc.subject | children | - |
dc.subject | preschool | - |
dc.title | The Use of a Fitbit Device for Assessing Physical Activity and Sedentary Behavior in Preschoolers | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.jpeds.2018.03.057 | - |
dc.identifier.scopus | eid_2-s2.0-85046627164 | - |
dc.identifier.volume | 199 | - |
dc.identifier.spage | 35 | - |
dc.identifier.epage | 40 | - |
dc.identifier.eissn | 1097-6833 | - |
dc.identifier.isi | WOS:000439478200009 | - |
dc.identifier.issnl | 0022-3476 | - |