sleep cycle 90 minute rule
Research has shown that people have a cycle of sleep (deep sleep - shallow sleep) in which each cycle or each cycle lasts 90 minutes. We sleep and wake up during the deep sleep. Then there will be food that is sickly. Sozawa does not want to get up in the most, even if we sleep for a long time.
If we wake up when they are asleep Our brain will wake up. Causing no drowsiness that is because of the cycle of sleep For anyone who wants to have a simple wake-up aid Without having to set the alarm clock to 10 times before getting to take a shower, try using the calculation program at the bottom of the bed.