Adults need 7–9 hours of sleep per night. Sleep supports immune function, memory consolidation, mood regulation, and tissue repair. Chronic poor sleep increases risk of heart disease, diabetes, and obesity.
Sleep cycles: We cycle through light sleep, deep sleep, and REM (dream) sleep. Each stage has distinct benefits. Disrupted cycles—from screens, caffeine, or irregular schedules—affect quality.
Sleep hygiene: Keep a consistent schedule, create a dark and cool bedroom, avoid screens 1 hour before bed, limit caffeine after noon, and use the bed only for sleep.
When to seek help: Persistent insomnia, loud snoring with daytime fatigue (possible sleep apnoea), or restless legs. A sleep specialist can diagnose and treat underlying conditions.
Related topics
- Wellness
- Mental health
- Prevention