Why Sleep Stages Matter
Each night, your brain cycles through NREM and REM sleep (~90–110 min each) → essential for restoration, memory, hormones.
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Sleepin.rest — Sleep Cycle Calculator
Calculate optimal sleep/wake times and read quick guides to improve your sleep.
Read & Learn — Quick Sleep Guides
Deep Sleep Benefits
Deep (N3) sleep is key for healing, growth hormone production, and memory consolidation. Missing it leads to grogginess.
Read Full →REM Sleep & Brain Health
REM supports mood, emotional memory, and learning. It increases over the night—forming ~20–25% of sleep.
Read Full →Sleep Hygiene Tips
Keep consistent timing, avoid screens, caffeine, & heavy meals before bed, and optimize temperature.
Read Full →Glymphatic Brain Cleanup
During sleep, the brain flushes out metabolic waste via the glymphatic system—critical for long-term brain health.
Read Full →How Blue Light Affects Sleep
Blue light from screens and LEDs can disrupt your circadian rhythm and melatonin production, making it harder to fall asleep and reducing sleep quality.
Read Full →Sleep and Mental Health
Sleep and mental health are deeply connected. Poor sleep can worsen anxiety and depression, while mental health issues can make sleep more difficult.
Read Full →Sleep and Immune Function
Quality sleep boosts your immune system, helping your body fight off infections and recover faster from illness.
Read Full →Sleep and Weight Management
Not getting enough sleep can disrupt hormones that control hunger and appetite, increasing the risk of weight gain and obesity.
Read Full →Sleep and Heart Health
Chronic sleep deprivation increases the risk of high blood pressure, heart disease, and stroke. Prioritize sleep for a healthy heart.
Read Full →About Sleepin.rest
Sleepin.rest is a small utility to help you estimate sleep and wake times based on 90-minute cycles. Includes tips to improve sleep quality. Built for speed, privacy, and ease of use.
Contact
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