Sleep Stages Guide
Learn about the stages of sleep: Light, Deep, and REM. Understand what happens during each stage.
Stage 1: Light Sleep (N1)
The transition between wakefulness and sleep. Lasts 5-10 minutes. Easy to wake from. Brain produces theta waves.
Stage 2: Light Sleep (N2)
Heart rate slows, body temperature drops. Makes up about 50% of total sleep. Sleep spindles occur.
Stage 3: Deep Sleep (N3)
Most restorative stage. Growth hormone released. Hard to wake. Critical for physical recovery and immune function.
REM Sleep
Rapid Eye Movement stage. Most dreaming occurs. Critical for memory consolidation and learning. Brain is highly active.
About Sleep Stages Guide
Learn about the stages of sleep: Light, Deep, and REM. Understand what happens during each stage. This tool uses evidence-based sleep science to provide accurate recommendations for better rest.
The Science of Sleep Cycles
A complete sleep cycle lasts approximately 90 minutes and consists of four stages: two stages of light sleep, one stage of deep sleep, and REM (Rapid Eye Movement) sleep. Waking up between cycles, rather than in the middle of one, helps you feel more refreshed and alert.
Tips for Better Sleep
- Maintain a consistent sleep schedule, even on weekends
- Keep your bedroom cool (65-68 degrees F) and dark
- Avoid screens for at least 30 minutes before bed
- Limit caffeine intake after 2 PM
- Exercise regularly, but not close to bedtime
Frequently Asked Questions
How does the Sleep Stages Guide work?
Learn about the stages of sleep: Light, Deep, and REM. Understand what happens during each stage.
Is this tool based on science?
Yes. Our calculations are based on sleep science research, including the standard 90-minute sleep cycle model and recommendations from sleep medicine experts.