Does FitBit Count The "Leading Hour" Of Sleep...?

[Argali]

According to How do I track my sleep with my Fitbit device?

Question: How does my Fitbit device automatically detect sleep?

Answer:
Wrist-based Fitbit devices and Google Pixel Watch automatically detect your sleep when you wear your device to bed. We recommend wearing your device in a snug wristband while sleeping; don’t wear your device in a clip or pendant accessory.
When your body is completely at rest and you haven't moved for about an hour, your device records that you're asleep.

Is that leading hour tacked on to your sleep time (or not included)?

[unidentifiable]

Hi @Argali and thank you for sharing your problem. My best guess is that the leading hour is not included, as your watch will not be sure if you are just trying to sleep, or actually sleeping.

[Argali]

That hour was still recorded. It would not be difficult to add that data onto the front end and evaluate it in the context of sleeping.

[Argali]

Also, the article said about an hour. Does anyone have the exact waiting period?

[LZeeW · Accepted solution]

@Argali   As someone who has been tracking sleep since automatic tracking was introduced, I can confirm that the leading hour is included.  Sleep tracking isn't perfect.  Sometimes my sleep stages graph starts with me asleep, as if I fell asleep somewhere between standing and lying down.  Fitbit doesn't publish anything more specific than about an hour.