Stages of sleep

NREM sleep consists of the following stages: - Light: In light sleep, the user transits from wakefulness to sleep. The user's breading and heart rate become regular and the user's body temperature drops. - Deep: In deep sleep, the user becomes less responsive to the user's surroundings. The user's breathing slows and his/her muscles are more relaxed. This is the stage when the user's body restores and recharges itself.

In REM sleep, the user's body is relaxed and immobile while the user's brain becomes more active and re-energizes itself for the next day. This is the stage when the majority of the user's dreams occur.

Awake includes the times you wake up briefly and the periods the user is restless during a sleep.

Sleep and Sleep Stage

HealthConstants.Sleep includes only the start and end time of the user's sleep. SleepStage gives detailed sleep stage information with several sections for the specified Sleep data. The sleep stage can be presented as the following figure.

Sleep #1

Sleep data is saved as "Sleep #1" if HealthConstants.Sleep is used only.

Sleep #2

Otherwise, "Sleep #2" data that is composed of HealthConstants.Sleep and HealthConstants.SleepStage.
It shows:

• The user goes to bed at 23:30.
• The his/her sleep stage is SLEEP_LIGHT for 23:30 ~ 00:40 of the next day.
• The his/her sleep stage is SLEEP_DEEP for 00:40 ~ 02:00.
• The his/her sleep stage is SLEEP_REM for 02:00 ~ 05:10.
• The his/her sleep stage is SLEEP_AWAKE for 05:10 ~ 06:30.
• He/she awakes at 06:30.

Properties

Properties of the following extending interfaces are available for this data type.

• HealthConstants.Common
• HealthConstants.SessionMeasurement

Property name	Description
HealthConstants.SleepStage.UUID	[Mandatory] Data's unique ID, assigned by the system when a new data is inserted
HealthConstants.SleepStage.CREATE_TIME	[Mandatory] UTC milliseconds when a data is created in the health data store, assigned by the system when a new data is inserted
HealthConstants.SleepStage.UPDATE_TIME	[Mandatory] UTC milliseconds when a data is updated in the health data store, assigned by the system when a new data is inserted or the existing data is updated
HealthConstants.SleepStage.PACKAGE_NAME	[Mandatory] Package name which provides data, assigned by the system when a new data is inserted
HealthConstants.SleepStage.DEVICE_UUID	[Mandatory] Device identifier which provides the health data
HealthConstants.SleepStage.START_TIME	[Mandatory] UTC milliseconds when the measurement is started
HealthConstants.SleepStage.END_TIME	[Mandatory] UTC milliseconds after the measurement has ended
HealthConstants.SleepStage.TIME_OFFSET	[Mandatory] Time offset in milliseconds which considers the time zone and daylight saving time
HealthConstants.SleepStage.SLEEP_ID	[Mandatory] The specified sleep data's ID
HealthConstants.SleepStage.STAGE	[Mandatory] Sleep stage
HealthConstants.SleepStage.CUSTOM	Custom info which is formatted with JSON and compressed data

Data Permission