🧠 What is a Sleep Cycle?
A typical sleep cycle lasts about 90 minutes and includes multiple stages: light sleep, deep sleep, and REM (rapid eye movement). Waking up at the end of a full cycle helps you feel more refreshed and alert.
🙋 Frequently Asked Questions
Why is a sleep cycle 90 minutes?
Studies show each cycle averages 90 minutes, covering all sleep stages from light sleep through deep sleep to REM.
Do I need exactly 8 hours of sleep?
Not always. Most adults function well on 7.5 hours (5 cycles). Quality matters more than quantity.
What's the best time to sleep for workers or students?
Workers: 10:30 PM – 6:00 AM for optimal productivity. Students: 11:00 PM – 8:00 AM for better learning retention.
🌙 Sleep Recommendations
💼 Working Adults
5 cycles (~7.5 hours)
Sleep at 10:30 PM
🎓 Students
6 cycles (9 hours)
Sleep at 11:00 PM
🏋️ Athletes
6+ cycles for recovery
Earlier bedtime recommended