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Still not impressed by Charge 3 HR accuracy during HIIT workouts : Fitbit, Smartwatch, Wearables : r/fitbit
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First Look: Fitbit Charge 3 Activity Tracker with SpO2 Sensor & Sleep Disturbance Tracking | DC Rainmaker
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My Charge 3 said I had over 200 heart rate from standing still : Fitbit, Smartwatch, Wearables : r/fitbit
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