05-08-2016 11:34
05-08-2016 11:34
05-08-2016 12:09
05-08-2016 12:09
It could well be true.
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.
05-08-2016 13:04
05-08-2016 13:04