Despite the lawsuit filed against Fitbit on January 5th on behalf of users of the product Charge HR and Fitbit Surge, its consumers still seem to believe in its accuracy to show heart rates. As there was a filed lawsuit you might wonder how trustworthy those wearables really are. But the brand has its reliable users who believe it is trustworthy.
According to the consumer report, it just retested both the Charge HR and Surge under more stringent conditions (additional arm locations and higher-impact workouts), and it found that both were effectively as accurate as a chest-based heart rate monitor. The only significant deviation was when using the Charge HR in particularly intense workouts, and even that could be fixed by wearing the wristband on the forearm.
But it is not obvious that the devices are flawless, or that the lawsuit has no merit. If your Fitbit occasionally underreports your heart rate by a wide margin, that’s a real concern – you could perform high-intensity workouts without realizing that you’re over-stressing your heart. Also, there are questions as to whether or not the test is really comprehensive.
The Consumer Reports study isn’t broad enough to completely rule out issues that could appear with different body sizes and fitness routines. Perhaps, the findings suggest that the errors might not be as widespread as implied by the lawsuit. They may exist, but they are not necessarily easy to replicate.