Strange sleep logging started today

[SleeperC]

I was working on my computer, so absorbed that I may sit very still. So a 'deep sleep' of 1 hour was logged between 9 and 10 a.m.!  I had to manually delete it.  It never happened before. 

You may want to check your sleep log today. Something is wrong. 

Moderator edit: word choice

[SunsetRunner · Accepted solution]

Hi @SleeperC - Fitbit estimates your sleep stages using a combination of your movement and heart-rate patterns. When you haven’t moved for about an hour, your tracker or watch assumes that you’re asleep. You must have been very absorbed in your work! You can turn on Reminders to Move or just make it a habit to get up and walk or at least move your arms every half hour or so. It’s a good healthy habit, anyway. You can ready more about Fitbit and sleep here. 

[SleeperC]

Thank you. I did find a few logs like this in the past as well. Is there a
way to set sleep only after, say 10pm?

I am really surprised my heart could decline to such a low level.

[SunsetRunner]

@SleeperC - it’s possible to set a sleep schedule, but since sleep is automatically detected, you cannot tell it to ignore sleep between certain hours. As for the low heart rate, maybe that is all the more reason to get up and move more often? If it becomes a concern, you can always check with your doctor. 

[SleeperC]

No, I'm not alarmed or worried, as I'm very active through a day. I also have the 'reminder' setup. 

It just shows the limitation of sleep tracking tech as it is now. It also shows that people of certain professions, e.g. data analysts, computer programmers and writers, probably need to check their sleep log occasionally.