Study finds Fitbits are “inaccurate”

The accuracy of Fitbit trackers has been questioned by a new study.

Researchers at California State Polytechnic University claim the popular heart rate trackers, specifically the Surge and Charge HR, are “highly inaccurate.” Their study revealed Fitbit trackers miscalculated heart rates by around 20 beats per minute on average during intense exercise.

Researchers tested the heart rates of 43 healthy adults using a Fitbit and compared the results with those gathered from an electrocardiogram.


The study was commissioned by lawyers representing a group of customers who are suing Fitbit over the accuracy of its products.

Fitbit have since slammed the study, challenging its purpose and methodology, as well as the quality of the electrocardiogram used.