The sleep calculator above helps you to pick the best possible hour to wake up allowing you to get several 90 minute sleep cycles. There are several ways to use Sleepty:
If you have an Android device, you can download a mobile app from AppStore. The app has features like:
One would think that sleeping is a simple process - you go to bed and wake up fully refreshed. But in reality, sleeping follows a specific pattern, switching between deep sleep and REM sleep. These sleep phases form a cycle which occurs for approximately 90 minutes.
NREM sleep is divided into three stages.
This stage is also called "transitional sleep" or "light sleep". During Non-REM, body temperature, heart rate, breathing rate decrease. Also, during this stage, people have slow eye movements. Your body starts preparing you for sleep.
No eye movement occurs in this stage. It is very easy to wake a person up.
This stage is commonly associated with deep sleep. During deep sleep it is extremely difficult to wake up.
REM sleep is known for occurrence of dreams. It takes approximately 70 to 90 minutes to get there after falling asleep.
Usually it is way easier to wake up during slow-wave sleep which occurs soon after the end of a REM phase.
According to some studies, people who live the longest self-report sleeping for 6-7 hours each night. Of course, it all depends on an individual's physiology and age.