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New study looks at the accuracy of popular fitness trackers

The "Flex", an "electronic coach", device by Fitbit is presented at the Mobile World Congress in Barcelona, on February 24, 2014.

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A new Stanford University study looks at the accuracy of seven popular fitness trackers on the market, compared to results of tests that doctors use.

The good news is that these trackers are found to be largely accurate when it comes to measuring heart rate. The bad news: they are way off when it comes to calculating the number of calories burned.

As fitness trackers gain popularity, many users are taking data from their wearables to their doctors even though the information yielded are not always accurate. How are doctors dealing with this information?  

Guest host Libby Denkmann in for Larry Mantle


Anna Shcherbina, a graduate student in Biomedical Informatics at Stanford University; one of the co-authors of the new study published in the Journal of Personalized Medicine looking at the accuracy of seven popular fitness trackers

Neil Jay Sehgal, an assistant professor of Health Services Administration at the University of Maryland School of Public Health