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February 28, 2018PLoS ONEOpen Access

Assessment of the Fitbit Charge 2 for monitoring heart rate

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Why the study?

Does the Fitbit Charge 2 accurately measure heart rate compared to a gold standard electrocardiograph in healthy adults?

Population

15 healthy Caucasian adults, mean age 31 and 32. Excluded: neurological or cognitive disorders, recent…

Comparison

Fitbit Charge 2 worn on the non-dominant wrist vs Gold standard electrocardiograph with 3 chest…

Design

Other

Follow-up

10 minutes

Authors

CCChristian CaldatoEBElia BazzanDGDarren C. GreenwoodUniversity of Leeds

Discussion

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Implication

Caution advised for Fitbit heart rate data in clinical decisions; leaves open accuracy of consumer wearables pending further validation.

Structured PICO

Does the Fitbit Charge 2 accurately measure heart rate compared to a gold standard electrocardiograph in healthy adults?

P
Population
15 healthy Caucasian adults (8 females, 7 males), mean age 31 (males) and 32 (females). Excluded: neurological or cognitive disorders, recent musculoskeletal damage or surgery, and tattoos.
I
Intervention
Fitbit Charge 2 worn on the non-dominant wrist
C
Comparator
Gold standard electrocardiograph (ProComp Infiniti T7500M) with 3 chest electrodes
O
Outcome
Accuracy and precision of heart rate measurement (mean bias and limits of agreement)surrogate

The Fitbit Charge 2 underestimates heart rate during cycling and has poor precision for individual measurements, limiting its utility for accurate clinical or fitness monitoring.

Limitations

  • Small sample size (15 participants)
  • Limited diversity in skin characteristics, BMI, and ages
  • Only tested during cycling, not across varied exercise intensities
  • Data loss (up to 35%) for some participants due to device inability to continuously register data

Cite This Study

Caldato et al. (2018) studied this question.

synapsesocial.com/papers/6a7cc382cc6f1443deba66a8https://doi.org/10.1371/journal.pone.0192691
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Examining The Validity Of Fitbit Charge HR For Measuring Heart Rate In Free-living Conditions2016 · 6 citations
  2. 2Accuracy of Wrist-Worn Heart Rate Monitors2016 · 410 citations
  3. 3Validation of a Self‐Monitoring Tool for Use in Exercise Therapy2017 · 19 citations
  4. 4Photoplethysmography and its application in clinical physiological measurement2007 · 3,991 citations
  5. 5Variable Accuracy of Wearable Heart Rate Monitors during Aerobic Exercise2017 · 360 citations