How Sleep Cycles Work:

• • Sleep Cycle: A complete sleep cycle lasts about 90 minutes and includes both REM and non-REM sleep stages.
• • Stage 1 (N1): Light sleep where you can be easily awakened (5% of total sleep).
• • Stage 2 (N2): Body temperature drops and heart rate slows (45% of total sleep).
• • Stage 3-4 (N3): Deep sleep crucial for physical recovery (25% of total sleep).
• • REM Sleep: Rapid Eye Movement stage where most dreaming occurs (25% of total sleep).

Why Sleep Cycles Matter:

• • Waking up during light sleep (end of a cycle) helps you feel more refreshed.
• • Disrupting deep sleep or REM sleep can cause grogginess.
• • Most adults need 5-6 complete sleep cycles per night for optimal rest.
• • Following natural sleep cycles can improve sleep quality and daytime energy.

Note: This calculator provides estimates based on average sleep cycles. Individual sleep patterns may vary. If you consistently experience sleep problems, consult a healthcare professional.