Polar Electro Unite User Manual page 45

wristband firmly around your wrist. The sensor on the back of the watch must be in constant touch with your skin.
For more detailed wearing instructions, see
3. Your watch detects when you fall asleep, when you wake up and how long you spent sleeping. The Sleep Plus
Stages measurement is based on recording the movements of your non-dominant hand with a built-in 3D
acceleration sensor and recording your heart's beat-to-beat interval data from your wrist with an optical heart rate
sensor.
4. In the morning you can see your sleep score (1-100) from your watch. You get sleep stages information (light sleep,
deep sleep, REM sleep) and a sleep score after one night, including feedback on sleep themes (amount, solidity and
regeneration). After the third night, you get a comparison to your usual level.
5. You can record your own perception of your sleep quality in the morning by rating it on your watch or in the Flow
app. Your own rating is not taken into account in the sleep charge calculation, but you can record your own
perception and compare it to the sleep charge assessment you get.
Sleep data on your watch
When you wake up you can access your sleep details via the
display to open the Nightly recharge status details and then tap Open under Sleep charge details.
You can also stop the sleep tracking manually.
your watch has detected a minimum of four hours of sleep. Tap the Already awake? text to tell the watch
that you're awake and it will ask you if you want to stop sleep tracking. Confirm by tapping
watch summarizes your sleep instantly.
The sleep charge details view displays the following information:
1. Sleep score status graph
2. Sleep score (1-100) A score that summarizes your sleep time and sleep quality into a single
number.
3. Sleep charge = Sleep score compared to your usual level. Scale: much below usual – below usual –
usual – above usual – much above usual.
4. Sleep time tells you the total duration between when you fell asleep and when you woke up.
5. Actual sleep (%) tells the time spent asleep between the time you fell asleep and when you woke
up. More specifically, it is your sleep time minus the interruptions. Only the time you actually spend
asleep is included in actual sleep.
6. Continuity (1-5): Sleep continuity is a rating of how continuous your sleep time was. Sleep
continuity is evaluated on a scale from one to five: fragmented – fairly fragmented – fairly
continuous – continuous – very continuous.
7. Long interruptions (min) tells the time you spent awake during the interruptions longer than one
minute. During a normal night's sleep there are numerous short and long interruptions when you
actually awaken from your sleep. Whether you remember these interruptions or not depends on
their duration. The shorter ones we don't usually remember. The longer ones, for instance when one
might get up for a sip of water, we can remember. Interruptions are illustrated as yellow bars on
your sleep timeline.
8. Sleep cycles: A normal sleeper typically goes through 4-5 sleep cycles over the course of a night.
This equals to a sleep time of approximately 8 hours.
9. REM sleep %: REM stands for rapid eye movement. REM sleep is also called paradoxical sleep as
your brain is active but your muscles are inactive to avoid acting out dreams. Just as deep sleep
restores your body, REM sleep restores your mind, and enhances memory and learning.
10. Deep sleep %: Deep sleep is the stage of sleep in which it is hard to be awakened since your body is
less responsive to environmental stimuli. Most deep sleep occurs during the first half of the night.
This sleep stage restores your body and supports your immune system. It also affects certain
aspects of memory and learning. The stage of deep sleep is also called slow wave sleep.
11. Light sleep %: Light sleep serves as a transition stage between wakefulness and the deeper stages
of sleep. You can be easily awoken from light sleep since your responsiveness to the environmental
stimuli remains quite high. Light sleep also promotes mental and physical recovery, although REM
and deep sleep are the most important sleep stages in that regard.
Wrist-based heart rate measurement.
Already awake?
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Nightly Recharge watch face. Tap the
is shown on the sleep watch face when
and the