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About:
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The Sleep Cycle Calculator helps you determine the best time to go to bed or wake up based on natural sleep cycles. Human sleep occurs in repeating cycles that last about 90 minutes, moving through stages of light sleep, deep sleep, and REM sleep. This tool calculates optimal sleep and wake-up times so you can wake up at the end of a complete cycle and feel more refreshed and energized instead of groggy. Simply enter your desired bedtime or wake-up time, and the calculator will suggest the best
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