Sleepy time

Deep sleep - your body is completely relaxed - is very important. If you suddenly awakened during this period, your parts will not be able to adapt, and your mind will not be awake.
Our sleep is cyclical: 90 minutes/ cycle.
You should sleep at least five cycles. It's equivalent to 5x90 minutes = 450 minutes.

To calculate the ideal time to wake up, apply the following formula:
Wake time = bedtime + (90 minutes x number sleep cycle) + 14 minutes of tossing before fall to sleep.
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