Accurate

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You’ll Never Know How Accurate Your Fitness Tracker Is, and That’s OK

The appeal of fitness-tracking smartwatches is that they have all the answers. They turn our squishy bodies’ inscrutable secrets into hard numbers we can plainly read and analyze. But we would be fooling ourselves if we believed that our smartwatches always tell the truth. According to a new scientific analysis, not only do wearables often get things wrong, it may…