14 minutes
Advanced Sleep Factors
5 cycles
90 minutes

⚡ Quick Tip

  • Most adults function best with 5-6 complete sleep cycles
  • Each cycle is approximately 90 minutes
  • Waking mid-cycle causes grogginess (sleep inertia)
  • Quality matters more than quantity

Understanding Sleep Cycles

Sleep occurs in repeating cycles of approximately 90 minutes each. Each cycle progresses through stages:

Sleep Stages in Each Cycle:

  • 🌊 Stage 1 (5-10 min): Light sleep, easy to wake
  • 💤 Stage 2 (20 min): Body temperature drops, heart rate slows
  • 🌙 Stage 3 (20-40 min): Deep sleep, physical restoration
  • 👁️ REM (10-60 min): Dreams, memory consolidation

Why This Matters:

Waking at the end of a cycle (during light sleep or early REM) feels natural and refreshing. Waking during deep sleep (Stage 3) causes sleep inertia — that groggy, disoriented feeling that can last 30+ minutes.

Research-Backed Benefits:

  • ✓ Improved alertness and cognitive function
  • ✓ Better mood and emotional regulation
  • ✓ Enhanced memory consolidation
  • ✓ Reduced sleep inertia upon waking
  • ✓ More consistent energy throughout the day

Your Optimal Sleep Schedule

0h 0m Total Sleep Time
0 Complete Cycles
0% Sleep Efficiency

Recommended Bedtimes

Sleep Cycle Timeline

Your sleep will progress through these cycles:

Optimal Sleep Window

💡 Personalized Recommendations

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