My Sleep Start/Stop time appears inaccurate

The detection of sleep relies on the combination of "body movement" and "heart rate". Body movement pertains to physical activity, specifically the wrist movement of wearing a band or watch, which may cause differences in the results of sleep. If the body movement is minimal and the heart rate is low during sleep, it is considered deep sleep. Conversely, if the body movement is active and the heart rate is high, it is considered light sleep. In case you wake up and move around less, the device might assume that you are still sleeping. The device may wrongly detect the sleep status if you have light steps and minimal movements when going to the bathroom. However, if you turn over during sleep, the device may identify that you are awake.

Besides, sleep monitoring can stop tracking if the device detects enough movement that indicates you have entered an "awake" state for an extended period of time during the night. This may include getting up to use the restroom and then wandering through the house, causing your watch to accumulate a large enough step count or an elongated elevated heart rate to trigger you to be in an awake state. Due to this, your watch may not return to sleep mode for the remainder of the night.

If it isn't worn properly, it may affect the accuracy of the data. To avoid missing or inaccurate sleep data, please pay attention to the following instructions:

Fasten your watch so it is in contact with your skin: When you sleep, wear your watch tightly on your wrist. Otherwise, your watch may not be able to monitor and record your sleep data.
Avoid excessive wrist movement while asleep: If your wrist moves too much, the sensor will determine that you are not asleep, resulting in missing data. It is recommended that you wear your watch on your non-dominant wrist while sleeping.
Sleep for long periods of time: If the duration is less than 20 minutes, the watch may not be able to detect that you are asleep. It is recommended that you sleep for at least 20 minutes while wearing your wearable device to ensure that sleep data is recorded.

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