Fitbit publicly announced research results that "measured data" of Fitbit as "inaccurate", Fitbit argues that the result of the research is "inaccurate"

"Fitbit", a wristband type activity tracker that can manage all kinds of daily health-related data, from a user in January 2016 class action suits as "measured heart rate data is inaccurate and far from advertising complaints" I was woken up. A research team at the California State University of Technology who received a request from the defense team of the user who caused the class action suffered a research result that "heart rate data measured by PurePulse installed in Fitbit" is quite inaccurate " It has been made public and Fitbit is in a situation to dispute.

Validation Study Final.DOCX - Fitbit_Validation_Study.pdf
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According to the published research report, the research team collected a total of 43 subjects consisting of 22 adult males and 21 adult females, and the question "Fitbit Charge HR"When"Fitbit SurgeIn order to compare these data with these two data, one product is attached to both arms, a heart rate measurement system connected to a medical electrocardiograph as "an instrument that can accurately measure heart rate" One "BioHarness" also measures heart rate. In the research, we had activities such as "standing through", "jogging", "treadmill" and "stair climbing" for 5 minutes each, and compared and analyzed the data collected from the device.

Experimental results showed that Fitbit Charge HR and Fitbit Surge showed errors of up to 20 times per minute for beating frequency. Also, we were unable to measure data during exercise, that is, PurePulse was not working properly. In the experiment, it is said that the data discrepancy of Fitbit Surge was larger than that of Fitbit Charge HR. The researcher said, "The heart rate of the user measured by PurePulse is incorrect, especially when we were doing high-load exercise, the data inaccuracy became noticeable.Therefore, Fitbit Charge HR and Fitbit Surge Can not be used to provide meaningful heart rate data for the user. "

ByJulien Doclot

He is one of the lawyersJonathan Sarbin"We are not claiming that Fitbit is a medical device, and this has nothing to do with this time, and this case is based on Fitbit's marketing method and a device that can measure heart rate It is against what we do not provide meaningful measurement data to users despite the price of both products being set higher than others. "

For Fitbit Charge HR and Fitbit Surge incorrect heart rate data measured by this research, Fitbit makes inaccurate research resultsPublish statement. In the statement, "What the prey's defense team calls" research "includes prejudice, it is factless and it is only an attempt to withdraw the compensation from our company.The results of the research are scientifically incorrect A defective experimental method is used.In research, the lawyers who filed lawsuit against us have paid fees, and the heart rate measurement system used in the experiment is not for medical use but for consumers In addition, there is no evidence that the heart rate measurement system used in the experiment can measure accurate heart rate data ".


According to Fitbit, the technology of PurePulse has been developed and developed by the research team 3 years ago when Fitbit products appear on the market, and is known for product comparison surveyConsumer ReportsAfter class actionsOwn survey, It was said that it was evaluated as "excellent product" for both Fitbit Charge HR and Fitbit Surge products.

He is an Associate Professor at the Ball State State University Clinical Practice Physiology Department and has previously tested wearable products including FitbitAlex Montoya"Although Fitbit measures the appropriate data for various activities, it seems to be difficult to perfectly measure the activity that Fitbit can track, and on the product page of Fitbit," The word "tracking" is used instead of "measurement." Users should not consider Fitbit as a medical-level device, Fitbit does not even explain a product "for medical use" a word. " I am talking.