Sometimes you can spot gaps in the resting heart rate or heart rate variability (HRV) graphs. Usually this means that something has interfered with your pulse signal tracking, and the ring hasn’t been able to detect your heart rate properly.
Here are the most common reasons for it:
- The ring is too loose and spins around your finger, which means that its LED sensors aren’t positioned optimally for tracking. Or the ring is so loose that the sensors don’t have a good quality contact with your skin. Before going to bed, check that the LED sensors are underneath your finger, and the ring sits snugly enough. If the ring feels too loose, try wearing it on a different finger. Note: make sure that the ring doesn’t feel too tight, either.
- The LED sensors are dirty. You can wash the sensors and the whole ring with water and mild soap. Rinse and dry the ring thoroughly with a soft cloth.
- The ring detects a lot of movement, which temporarily disturbs pulse signal tracking. This can also happen if you’re awake during the night and move around.
- You sleep in a position where your hand goes numb (causing partially blocked blood circulation).
- Your resting heart rate is exceptionally low (below 33 bpm).
- There are interferences in tracking due to arrhythmia. It’s worth noting that gaps don’t usually mean that you would suffer from an arrhythmia, and you can’t use the graph data to diagnose medical conditions.
Please make sure that your Oura app and your ring's firmware are updated to the latest versions.
Here’s how the gaps can look like in the app:
Learn more about resting heart rate and HRV graphs.