Inter-instrument reliability and agreement of Fitbit charge measurements of heart rate and activity at rest, during the modified Canadian aerobic fitness test, and in recovery
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Purpose: We determined the inter-instrument reliability and agreement parameters of the Fitbit Charge Heart Rate (Charge HR) device during three phases: rest, modified Canadian Aerobic Fitness Test (mCAFT), and recovery. Method: We recruited 60 participants for this cross-sectional measurement study using convenience and snowball sampling approaches. The performance of the Charge HR was assessed throughout the rest, mCAFT, and recovery phases. To establish inter-instrument reliability, the Charge HR variables – heart rate, steps taken, and energy expenditures – were compared with those for two other devices: the Zephyr BioHarness (ZB) for heart rate and the Fitbit One for steps taken and energy expenditure. Measurements were recorded every 30 seconds. Results: At rest, the inter-instrument intra-class correlation coefficient (ICC) (standard error of measurement [SEM]) for the Charge HR versus the ZB was ≥ 0.97 (range, min–max, 1.02–1.32). During the mCAFT and in recovery, the ICCs (SEMs) for the Charge HR and the ZB were ≥ 0.89 (range, min–max, 1.30–3.98) and ≥ 0.68 (range, min–max, 3.58–8.35), respectively. During the mCAFT only, the number of steps taken and the energy expenditure recorded by the Charge HR and the Fitbit One displayed ICCs (SEMs) of 0.97 (83.00) and 0.77 (14.70), respectively. The average agreement differences in heart rate in this pair-wise device comparison indicated mean differences of –0.20, 4.00, and 1.00 beats per minute at rest, during the mCAFT, and in recovery, respectively. Conclusions: The Charge HR heart rate variable demonstrated excellent inter-instrument reliability compared with the ZB and provided good levels of agreement. The steps taken and energy expenditure variables displayed excellent reliability measures between Charge HR and Fitbit One. Our findings may be used to capture field-based wireless measures of heart rate in various phases and provide information about possibly using the Charge HR and ZB devices interchangeably.
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For the validation study, a sample size of n=20 participants is deemed sufficient, as reported in the literature.
“For the validation study, considering as a first main outcome HR, a sample size of n = 20 participants is deemed sufficient, as reported in the literature [50–52].”
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Cites
STATISTICAL METHODS FOR ASSESSING AGREEMENT BETWEEN TWO METHODS OF CLINICAL MEASUREMENT
Martin Bland, J., & Altman, D. (1986) · The Lancet · doi:10.1016/s0140-6736(86)90837-8 · Cited by 47,965 · see citing works
Health Measurement Scales--A Practical Guide to Their Development and Use
Waclawski, E. (2010) · Occupational Medicine · doi:10.1093/occmed/kqp179 · Cited by 1,870 · see citing works
Sanjeev, B. (2006) · Jaypee Brothers Medical Publishers (P) Ltd. eBooks · doi:10.5005/jp/books/10313 · Cited by 1,005 · see citing works
Foundations of clinical research. Applications to practice
Fortney, L. (1993) · Medical Entomology and Zoology · Cited by 700 · see citing works
Assessment of Physical Activity and Energy Expenditure: An Overview of Objective Measures
Hills, A. P., Mokhtar, N., & Byrne, N. M. (2014) · Frontiers in Nutrition · doi:10.3389/fnut.2014.00005 · Cited by 587 · see citing works
Assessment of energy expenditure for physical activity using a triaxial accelerometer
Bouten, C. V. C., Westerterp, K. R., Verduin, M., & Janssen, J. J. (1994) · Medicine & Science in Sports & Exercise · doi:10.1249/00005768-199412000-00016 · Cited by 451 · see citing works
Fitbit®: An accurate and reliable device for wireless physical activity tracking
Diaz, K. M., Krupka, D. J., Chang, M. J., Peacock, J., Ma, Y., Goldsmith, J., Schwartz, J. E., & Davidson, K. W. (2015) · International Journal of Cardiology · doi:10.1016/j.ijcard.2015.03.038 · Cited by 405 · see citing works
Validity of Consumer-Based Physical Activity Monitors
LEE, J.-M., KIM, Y., & WELK, G. J. (2014) · Medicine & Science in Sports & Exercise · doi:10.1249/mss.0000000000000287 · Cited by 401 · see citing works
Accuracy of wrist-worn heart rate monitors
Wang, R., Blackburn, G., Desai, M., Phelan, D., Gillinov, L., Houghtaling, P., & Gillinov, M. (2017) · JAMA Cardiology · doi:10.1001/jamacardio.2016.3340 · Cited by 386 · see citing works
Validation of the Fitbit One activity monitor device during treadmill walking
Takacs, J., Pollock, C. L., Guenther, J. R., Bahar, M., Napier, C., & Hunt, M. A. (2013) · Journal of science and medicine in sport · doi:10.1016/j.jsams.2013.10.241 · Cited by 322 · see citing works
Correlation, Agreement, and Bland–Altman Analysis: Statistical Analysis of Method Comparison Studies
Bunce, C. (2009) · American Journal of Ophthalmology · doi:10.1016/j.ajo.2008.09.032 · Cited by 251 · see citing works
Heart rate monitoring during training and competition in cyclists
Jeukendrup, A. E., & Diemen, A. V. (1998) · Journal of Sports Sciences · doi:10.1080/026404198366722 · Cited by 213 · see citing works
Brazier, J. E., & Deverill, M. (1999) · Health Economics · doi:10.1002/(sici)1099-1050(199902)8:1 · Cited by 189 · see citing works
Kim, J.-H., Roberge, R., Powell, J., Shafer, A., & Williams, W. J. (2012) · International Journal of Sports Medicine · doi:10.1055/s-0032-1327661 · Cited by 124 · see citing works
Psychometric properties of the Zephyr bioharness device: a systematic review
Nazari, G., Bobos, P., MacDermid, J. C., Sinden, K. E., Richardson, J. A., & Tang, A. (2018) · BMC Sports Science Medicine and Rehabilitation · doi:10.1186/s13102-018-0094-4 · Cited by 104 · see citing works
Self-citationNazari, G., MacDermid, J. C., Sinden, K. E., Richardson, J. A., & Tang, A. (2017) · The Journal of Strength and Conditioning Research · doi:10.1519/jsc.0000000000001842 · Cited by 99 · see citing works
Self-citationA Study to Validate the Modified Canadian Aerobic Fitness Test
Weller, I. M. R., Thomas, S. G., Gledhill, N., Paterson, D. H., & Quinney, A. (1995) · Canadian Journal of Applied Physiology · doi:10.1139/h95-015 · Cited by 77 · see citing works
Dolezal, B. A., Boland, D. M., Carney, J., Abrazado, M., Smith, D. L., & Cooper, C. B. (2014) · Journal of Occupational and Environmental Hygiene · doi:10.1080/15459624.2014.925114 · Cited by 28 · see citing works
Concurrent Validity of the Armour39 Heart Rate Monitor Strap
Flanagan, S. D., Comstock, B. A., DuPont, W. H., Sterczala, A. J., Looney, D. P., Dombrowski, D., McDermott, D. M., Bryce, A., Maladouangdock, J., Dunn‐Lewis, C., et al. (2013) · The Journal of Strength and Conditioning Research · doi:10.1519/jsc.0b013e3182a16d38 · Cited by 10 · see citing works
Boudreaux, B. D., Cormier, C. L., Williams, B. M., HEBERT, E. P., & Kraemer, R. R. (2017) · Medicine & Science in Sports & Exercise · doi:10.1249/01.mss.0000519027.48408.29 · Cited by 1 · see citing works
Flagged first, then by citations
Research works printed but not linked: 5
- [1]1. Fitbit [homepage on the Internet]. San Francisco: Fitbit; 2015. [cited 2016 Apr]. Fitbit Charge HR Wireless Heart Rate + Activity Wrist Band. Fitbit Charge HR TM Product Manual Version 1.0 Available from: https://staticcs.fitbit.com/content/assets/help/manuals/manual_charge_hr_en_US.pdf. [Google Scholar]
- [2]2. American College of Sports Medicine. Health-related physical fitness assessment manual. 4th ed. Philadelphia: Lippincott Williams & Wilkins; 2013. [Google Scholar]
- [5]5. Zephyr Technology. BioHarness 3.0 user manual [Internet]. Annapolis (MD): Zephyr Technology; 2012. [cited 2016 Apr]. Available from: https://www.zephyranywhere.com/media/download/bioharness3-user-manual.pdf. [Google Scholar]
- [6]6. Fitbit. Fitbit one wireless activity + sleep tracker: user manual [Internet]. San Francisco: Fitbit; 2012. Available from: https://staticcs.fitbit.com/content/assets/help/manuals/manual_one_en_US.pdf. [Google Scholar]
- [16]16. Canadian Society for Exercise Physiology. The Canadian physical activity, fitness and lifestyle appraisal. 3rd ed. Ottawa: Canadian Society for Exercise Physiology; 2010. [Google Scholar]
Cited by
Sorted by citations
Rezaei, N., & Grandner, M. A. (2021) · Sleep Health · doi:10.1016/j.sleh.2021.02.008 · Cited by 118 · see citing works
Zhang, Y., Weaver, R. G., Armstrong, B., Burkart, S., Zhang, S., & Beets, M. W. (2020) · Journal of Sports Sciences · doi:10.1080/02640414.2020.1767348 · Cited by 88 · see citing works
Barteit, S., Boudo, V., Ouedraogo, A., Zabré, P., Ouremi, L., Sié, A., Munga, S., Obor, D., Kwaro, D., Huhn, S., et al. (2021) · PLOS ONE · doi:10.1371/journal.pone.0257170 · Cited by 51 · see citing works
Siddi, S., Bailon, R., Giné-Vázquez, I., Matcham, F., Lamers, F., Kontaxis, S., Laporta, E., Garcia, E., Lombardini, F., Annas, P., et al. (2023) · Psychological Medicine · doi:10.1017/s0033291723001034 · Cited by 31 · see citing works
Ward, W. H., Meeker, C. R., Handorf, E. R., Hill, M. V., Einarson, M. B., Alpaugh, R. K., Holden, T. L., Astsaturov, I. A., Denlinger, C. S., Hall, M. J., et al. (2021) · JCO Clinical Cancer Informatics · doi:10.1200/cci.20.00117 · Cited by 19 · see citing works
Domin, A., Uslu, A. S., Schulz, A., Ouzzahra, Y., & Vögele, C. (2022) · JMIR Formative Research · doi:10.2196/35118 · Cited by 21 · see citing works
Ze, L., Nazari, G., MacDermid, J. C., Modarresi, S., & Killip, S. C. (2020) · Archives of Physical Medicine and Rehabilitation · doi:10.1016/j.apmr.2020.02.011 · Cited by 12 · see citing works
Self-citationSiddi, S., Giné-Vázquez, I., Bailón, R., Matcham, F., Lamers, F., Kontaxis, S., Laporta, E., Pagès, E. G., Arranz, B., Costa, G. D., et al. (2022) · Journal of Clinical Medicine · doi:10.3390/jcm11237163 · Cited by 9 · see citing works
Agreement between original and Rasch-approved neck disability index
Ze, L., MacDermid, J. C., & Nazari, G. (2020) · BMC Medical Research Methodology · doi:10.1186/s12874-020-01069-w · Cited by 7 · see citing works
Self-citationde Zoete, R. M. J., Nikles, J., Coombes, J. S., Onghena, P., & Sterling, M. M. (2022) · Disability and Rehabilitation · doi:10.1080/09638288.2022.2127937 · Cited by 6 · see citing works
Condominas, E., Niubo, A. S., Domènech‐Abella, J., Haro, J. M., Bailón, R., Giné-Vázquez, I., Alacid, G. R., Matcham, F., Lamers, F., Kontaxis, S., et al. (2025) · Journal of Affective Disorders · doi:10.1016/j.jad.2025.02.010 · Cited by 5 · see citing works
Lukkahatai, N., Han, G., Benjasirisan, C., Park, J., Jia, H. M., Li, M., Li, J., Sheng, J. Y.-S., Carducci, M. A., & Saligan, L. N. (2025) · Cancers · doi:10.3390/cancers17152432 · Cited by 3 · see citing works
Lukkahatai, N., Benjasirisan, C., Shen, A., Li, J., Allgood, S., Thomas, F., Karyukin, A., Sheng, J. Y.-S., Engle, J. P., Lee, T.-Y., et al. (2025) · BMC Cancer · doi:10.1186/s12885-025-14887-2 · Cited by 2 · see citing works
Additional file 2 of Agreement between original and Rasch-approved neck disability index
Lu, Z., MacDermid, J. C., & Nazari, G. (2020) · Figshare · doi:10.6084/m9.figshare.12610301
Self-citationAdditional file 1 of Agreement between original and Rasch-approved neck disability index
Lu, Z., MacDermid, J. C., & Nazari, G. (2020) · Figshare · doi:10.6084/m9.figshare.12610298
Self-citation
- Authors
- Nazari, G., MacDermid, J. C., Sinden, K. E., Richardson, J., & Tang, A.
- Affiliations
- Western University (CA)
- Lakehead University (CA)
- McMaster University (CA)
- Corresponding author
- Nazari, Goris
- Venue
- Physiotherapy Canada
- Published
- 2019-08
- Volume
- 71
- Issue
- 3
- Pages
- 197-206
- ISSN
- 0300-0508 (ISSN-L)
- 1708-8313
- PMC
- PMC6830424
- OpenAlex
- W2916911087
- Cited by
- 15
- References
- 20
- Citations by year
- 2025: 3 · 2023: 1 · 2022: 3 · 2021: 3 · 2020: 5
- FWCI
- 1.89
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Physiotherapy Canada (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Scholarship@Western (Western University) (submittedVersion)
- Topics
- Health Sciences › Medicine › Physiology › Physical Activity and Health
- Physical Sciences › Engineering › Biomedical Engineering › Non-Invasive Vital Sign Monitoring
- Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
- Keywords
- wearable heart rate monitor, step count, energy expenditure, heart rate recovery
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