Questions about Sleep

[UKTom]

I often wake in the night and get up to make a cup of tea or walk around the house - say 20 minutes in total.   Sometimes the initial sleep (less than 3 hours) isn't recorded but at other times it is - as continuous sleep through the night. What determines how 20 minutes of waking time is recorded - ie as continuous sleep or not continuous?

Moderator edit: subject for clarity 

[WilsonFitbit]

Hello @UKTom, welcome to the community forums! Thank you for the information! 

Note that when your body is completely at rest and you haven’t moved for about an hour, your Fitbit device records that you’re asleep. Your time asleep is calculated by subtracting your time spent awake and restless from your overall tracked sleep time. For example, if you slept 8 hours but woke up 2 times for 15 minutes each, your time asleep would be 7 hr 30 min.

For more information, please check: How do I track my sleep with my Fitbit device?

I also suggest you to visit the following link and blog to get a better quality of your sleep. 

Hope this helps!