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New to FitBit, how accurate is the BMR function? My calories burned seem way too high for this morning. Steps are extremely accurate though! : r/ fitbit
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How Accurate is Fitbit Inspire, 2, HR, Versa 2, 3, Lite, Blaze, and Ionic Calorie Burn? - wearfanatic
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Fitness trackers aren't very accurate at measuring heart rate — and that can be dangerous - The Verge
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