WeVividWeVividFind the best bedtime or wake-up time using 90-minute sleep cycles.
Based on 90-minute sleep cycles and about 15 minutes to fall asleep. Most adults need 7–9 hours. This is a guide, not medical advice.
About 90 minutes of light, deep and REM sleep; waking at the end of a cycle often feels easier.
Most adults need 7–9 hours.
No. If you often struggle with sleep, talk to a doctor.
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