How Accurate Are Wearable Calorie Counts? Apple Watch, Garmin, Fitbit, and Oura Tested
Wearable calorie counts fail every systematic review: energy-expenditure error runs 20-30%+ across major brands, while heart rate stays under 5%. Device-by-device error rates for Apple Watch, Garmin, Fitbit and Oura, why lifting is the worst case, and what to use instead.
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