02-17-2016 20:52
02-17-2016 20:52
Best Answer02-18-2016 00:14
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02-18-2016 00:14
As well as tracking calories you burn through activity, your fitbit also tracks your BMR calories. These are the calories you burn just keeping your body alive (even when asleep). They are calculated from your profile settings (age, weight etc) so you needn't be wearing your fitbit to get them. What you are seeing is the total BMR calories since midnight. There's more information on this here:
Best Answer