About Sleep Rings & Quality.
 AutoSleep uses a concept called Sleep Rings. You can think of these as the flip side to your Apple Watch's Activity Rings. Instead of filling them by moving, exercising and standing, you fill them simply by sleeping.
If you wear your Watch to sleep, then your sleep data will be represented by sleep rings.
☾ - Time Asleep This reflects the time that you spent asleep. You fill this ring by sleeping enough hours to meet the sleep hour target that you set in the AutoSleep wizard.
★ - Quality Sleep The Quality ring shows hours of quality sleep achieved. This makes it easier to compare with other days. This looks at the overall sleep time, how much light sleep, how much deep sleep, how restless and the nocturnal dip in heart rate and determines how much quality sleep you had. The ring completion target is 85% of your required sleep hours. You can change this below.
♥ - Average Heart Rate This is your average heart rate during the time that you were asleep. The ring reflects the quality of the nocturnal dip in heart rate. This is measured as the percentage difference between your average heart rate when not engaged in physical activity and your average heart rate when sleeping. If you are interested in understanding more about nocturnal dip, there is an interesting study here. Z - Deep Sleep The Deep Sleep ring is the number of hours where you met a sufficient nocturnal dip in heart rate combined with minimal movement. Refer the "Profile" section below to change how this and the heart rate ring are calculated. The main value of this ring is to compare it against your own historical data rather than to other people. The ring completion target is 35% of your required sleep hours. You can change this target below.  If you scroll down, there is a breakdown of each individual ring with a comparison to the trailing 7 days. Ring Targets Here you can also change your targets for required sleep hours, quality target and deep sleep target. This is done by pressing the "..." button. You can also change your profile. Profile To deliver more relevant sleep quality analysis, the profile section is broken up into three types. These have an influence over the way the heart rate ring is represented and deep sleep is calculated.
This is meant for people that have a high level of heart fitness. Normally this results in a significant nocturnal dip in heart rate. Often around 20%. The main reason for this setting is to change the calculations so that fluctuations in heart rate and deep sleep can be more easily portrayed.
This is the default. It is suitable for most people.
This is primarily to allow people that don't experience a nocturnal dip in heart rate to be able to reflect deep sleep. People with pacemakers, heart problems and lower levels of heart fitness should choose this option. It removes the requirement of nocturnal dip from deep sleep tracking and changes the presentation of the heart rate ring. Sleep Graph
Just below the sleep clock is a sleep analysis graph.  The graph uses an intelligent display where it labels three graduated sections which shows your awake time, lighter and deeper sleep zones. When you stop scrolling, the labels fade out and your heart rate fades in. There is also a line showing the overall average heart rate. Here you will find one graph per sleep session. A sleep session is defined as any period that you have been asleep with a break under 4 hours in duration.
The blue graphics indicate the periods that you were asleep. The higher they rise, the more active you were. The green graphics indicate periods in which you were awake. The hearts plot your heart rate during the time that you were asleep. Brighter hearts indicate that the heart rate had a significant nocturnal dip (see heart rate ring above). Darker hearts indicate that the heart rate was above your daytime average regular heart rate. Periods of deeper sleep are shown as purple blocks. This is determined according your profile setting (above). |