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🧠 The Science of Sleep Cycles
→Each sleep cycle lasts approximately 90 minutes and includes light sleep, deep sleep, and REM sleep.
→Waking up at the end of a cycle means you wake during light sleep — feeling alert and refreshed.
→Waking up mid-cycle causes sleep inertia — that groggy, disoriented feeling that can last hours.
→Most adults need 5–6 complete cycles (7.5–9 hours) per night for optimal health.
💡 Better Sleep Tips
→Avoid screens for 30–60 minutes before bed — blue light suppresses melatonin production.
→Keep your bedroom cool (16–19°C) — your body temperature needs to drop to initiate sleep.
→Stick to a consistent sleep schedule, even on weekends — your circadian rhythm loves routine.
→Avoid caffeine after 2pm — it has a half-life of ~6 hours and stays in your system longer than you think.