The DOI matches its Crossref record; 19 of the 19 references it cites were found in a registry or an index.
Concurrent Validity of Wearable Activity Trackers Under Free-Living Conditions
Abstract
Brooke, SM, An, H-S, Kang, S-K, Noble, JM, Berg, KE, and Lee, J-M. Concurrent validity of wearable activity trackers under free-living conditions. J Strength Cond Res 31(4): 1097–1106, 2017—The purpose of this study is to evaluate the concurrent validity of wearable activity trackers in energy expenditure (EE) and sleep period time (SPT) under free-living conditions. Ninety-five (28.5 ± 9.8 years) healthy men ( n = 34) and women ( n = 61) participated in this study. The total EE and SPT were measured using 8 monitors: Nike+ FuelBand SE (NFB), Garmin VivoFit (VF), Misfit Shine (MF), Fitbit Flex (FF), Jawbone UP (JU), Polar Loop (PL), Fitbit Charge HR (FC), and SenseWear Armband Mini (SWA) (criterion measures: SWA for EE and a sleep log for SPT). The mean absolute percent error (MAPE) for EE was 13.0, 15.2, 15.5, 16.1, 16.2, 22.8, and 24.5% for PL, MF, FF, NFB, FC, JU, and VF, respectively. Mean absolute percent errors were calculated for SPT to be 4.0, 8.8, 10.2, 11.5, 12.9, 13.6, 17.5, and 21.61% for VF, FF, JU, FC, MF, SWA laying down, PL, and SWA, respectively. Concurrent validity was examined using equivalence testing on EE (equivalence zone: 2,889.7–3,531.9 kcal); 2 trackers fell short of falling in the zone: PL (2,714.4–3,164.8 kcal) and FC (2,473.8–3,066.5 kcal). For SPT (equivalence zone: 420.6–514.0 minutes), several monitors fell in the zone: PL (448.3–485.6 minutes), MS (442.8–492.2 minutes), and FF (427.7–486.7 minutes). This study suggests that the PL and FC provide a reasonable estimate of EE under free-living conditions. The PL, FC, and MF were the most valid monitors used for measuring SPT.
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“however, in systematic reviews, Fitbits outperform other commercially available devices when correlated with research-grade devices25,26.”
From Association of step counts over time with the risk of chronic disease in the All of Us Research Program (2022) · cites this paper as [25]
In the citing paper
“Nine studies (22 comparisons) examined energy expenditure in free-living settings compared with the criterion measures of doubly labeled water [104] and accelerometry [29,49,79,101,131,172,174,175].”
From Reliability and Validity of Commercially Available Wearable Devices for Measuring Steps, Energy Expenditure, and Heart Rate: Systematic Review (2020) · cites this paper as [79]
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Metadata
- Authors
- Brooke, S. M., An, H.-S., Kang, S.-K., Noble, J. M., Berg, K. E., & Lee, J.-M.
- Affiliations
- University of Nebraska at Omaha (US)
- Yong In University (KR)
- Corresponding author
- Lee, Jung-Min
- ORCID
- Lee, Jung-Min
- Venue
- Journal of Strength and Conditioning Research
- Published
- 2017-04
- Volume
- 31
- Issue
- 4
- Pages
- 1097-1106
- ISSN
- 1064-8011 (ISSN-L)
- OpenAlex
- W2502795088
- Cited by
- 79
- References
- 19
- Citations by year
- 2026: 3 · 2025: 4 · 2024: 4 · 2023: 4 · 2022: 11 · 2021: 14 · 2020: 15 · 2019: 8 · 2018: 10 · 2017: 5
- FWCI
- 6.17
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Journal of Strength and Conditioning Research (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Physical Activity and Health
- Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Context-Aware Activity Recognition Systems
- Health Sciences › Health Professions › General Health Professions › Mobile Health and mHealth Applications
- Keywords
- wearable activity trackers, concurrent validity, energy expenditure estimation, free-living conditions, equivalence testing, mean absolute percentage error, physical activity monitoring, sleep monitoring
- MeSH terms
- Fitness Trackers, Adult, Energy Metabolism, Female, Humans, Male, Sleep, Reproducibility of Results, Young Adult
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