- CNBC, Wednesday, May 25, 2016 12:47 PM
A class action lawsuit against Fitbit may have grown
teeth following the release of a new study which claims the company's popular heart rate trackers are "highly inaccurate." Researchers at the California State Polytechnic University, Pomona tested the
heart rates of 43 healthy adults with Fitbit's PurePulse heart rate monitors, using the company's Surge watches and Charge HR bands on each wrist. Subjects were then hooked up to a BioHarness device
that produced an electrocardiogram (ECG), to record the heart's rhythm against the data being produced by Fitbit's devices.
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