With some Fitbit devices, every beat may not get counted, according to claims in a proposed nationwide class action lawsuit filed Tuesday.
Three plaintiffs claim that their Fitbit wrist-based heart monitors, “Charge HR” and “Surge,” do not and cannot accurately measure heart rate as advertised. Those sales pitches claim that both products, which are sold for around $150 and $250, respectively, can continuously and accurately monitor heart rate, even during exercise—under tag lines such as “every beat counts.” But the lawsuit claims that the heart rate monitors, which tout “PurePulse Tracker” technology, seem particularly incapable of accurately measuring elevated heart rates, often reading dangerously underestimated rates during workouts.
In the lawsuit, plaintiff Teresa Black, of Colorado, claimed that her Charge HR device was off by 78 beats per minute (bpm) during one workout. Her personal trainer recorded her heart rate at 160 bpm, while her Fitbit read 82 bpm. “Plaintiff Black was approaching the maximum recommended heart rate for her age, and if she had continued to rely on her inaccurate PurePulse Tracker, she may well have exceeded it, thereby jeopardizing her health and safety,” the lawsuit stated.
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