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Sleep tracking

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‎04-23-2020 12:02

‎04-23-2020 12:02

I wear my Inspire HR for sleep tracking. It significantly overcounts

my sleep. For example, I’ll watch TV from 10-12 and sleep 12-6 and the app will indicate 8 hours of sleep. Also, my sleep score is almost the same every night (81-84) regardless of whether the Fitbit says I slept for 5 hours or 8. Any ideas why?

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‎05-05-2020 17:58 - last edited on ‎08-05-2025 10:05 by Fitbit Moderator

‎05-05-2020 17:58 - last edited on ‎08-05-2025 10:05 by Fitbit Moderator

Hi @Mike2201, welcome to the Community Forums! Sorry for the delay in responding your post.

Thanks for bringing this to our attention and for the details that were shared in your post. Let me share with you that 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. Additional data —such as the length of time your movements are indicative of sleep behavior (such as rolling over, etc.)— help confirm that you’re asleep.

While you’re sleeping, your device tracks the beat-to-beat changes in your heart rate, known as heart rate variability (HRV), which fluctuate as you transition between light sleep, deep sleep, and REM sleep stages. When you sync your device in the morning, we use your movement and heart rate patterns to estimate your sleep cycles from the previous night. 

Let me know if you have any additional questions.

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