The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.
Fitbit®: An accurate and reliable device for wireless physical activity tracking
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In the citing paper
“Five studies (50 comparisons) reported on interdevice reliability [85,113,116,117,166], with analyzed sample sizes ranging from 13 [117] to 29 [113].”
From Reliability and Validity of Commercially Available Wearable Devices for Measuring Steps, Energy Expenditure, and Heart Rate: Systematic Review (2020) · cites this paper as [116]
In the citing paper
“However, given the pace of technological change, these existing studies have largely been completed on devices that would be considered outdated, such as earlier Fitbit models (One, Zip, Flex, Ultra), Jawbone Up, and the Nike FuelBand.”
From Estimating Accuracy at Exercise Intensities: A Comparative Study of Self-Monitoring Heart Rate and Physical Activity Wearable Devices (2017) · cites this paper as [8]
In the citing paper
“Most research has primarily focused on the accuracy of estimates of EE [7-12].”
From Estimating Accuracy at Exercise Intensities: A Comparative Study of Self-Monitoring Heart Rate and Physical Activity Wearable Devices (2017) · cites this paper as [8]
In the citing paper
“In regard to specific exercise intensity, this study supports previous research that found the Fitbit device to overestimate EE during moderate activity [8].”
From Estimating Accuracy at Exercise Intensities: A Comparative Study of Self-Monitoring Heart Rate and Physical Activity Wearable Devices (2017) · cites this paper as [8]
In the citing paper
“The increased error from previous studies for the Fitbit device [8,10] suggests that the Fitbit Charge HR may utilize heart rate in determining EE.”
From Estimating Accuracy at Exercise Intensities: A Comparative Study of Self-Monitoring Heart Rate and Physical Activity Wearable Devices (2017) · cites this paper as [8]
In the citing paper
“For example, while Fitbit models have changed over time, the basic error rate has been similar across studies and devices [8,10].”
From Estimating Accuracy at Exercise Intensities: A Comparative Study of Self-Monitoring Heart Rate and Physical Activity Wearable Devices (2017) · cites this paper as [8]
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Liu, H., Zhan, L., & Lin, X. (2025) · Journal of Building Engineering · doi:10.1016/j.jobe.2025.112664 · Cited by 3
Metadata
- Authors
- Diaz, K. M., Krupka, D. J., Chang, M. J., Peacock, J., Ma, Y., Goldsmith, J., Schwartz, J. E., & Davidson, K. W.
- Affiliations
- Columbia University Irving Medical Center (US)
- Columbia University (US)
- Corresponding author
- Diaz, Keith M.
- Venue
- International Journal of Cardiology
- Publisher
- Elsevier BV
- Published
- 2015-04
- Volume
- 185
- Pages
- 138-140
- ISSN
- 0167-5273 (ISSN-L)
- PMC
- PMC4406840
- OpenAlex
- W2076953400
- Cited by
- 405
- References
- 3
- Citations by year
- 2026: 13 · 2025: 18 · 2024: 24 · 2023: 20 · 2022: 19 · 2021: 42 · 2020: 61 · 2019: 61 · 2018: 52 · 2017: 54 · 2016: 32 · 2015: 9
- FWCI
- 36.10
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- International Journal of Cardiology (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Columbia Academic Commons (Columbia University)
- Funders
- National Heart, Lung, and Blood Institute (R01-HL115941)
- NIH Diversity Supplement (R01-HL116470-02S1)
- 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
- Fitbit, wearable activity trackers, wearable devices, physical activity monitoring, device validity, device reliability, primary care, physical activity counseling
- MeSH terms
- Adult, Equipment Design, Female, Humans, Male, Middle Aged, Motor Activity, Reproducibility of Results, Monitoring, Ambulatory, Young Adult, Accelerometry, Healthy Volunteers
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
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