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?
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