Since the earliest childhood every person knows that he needs at least eight hours of sleep. Only in this case, he can be sure to get the perfect conditions for recharging energies after a hard working day in order to spend the next day to the utmost.
But what should the healthy sleep be like?
What is your ideal bedtime?
Sleep calculator will help you to identify this sacred amount, which is calculated on the basis of statistically average duration of sleep phases.
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