Sleep Your Way to Genius: The Science of Recovery
Sleep is not a passive state where your body shuts down. It is an active metabolic state where your brain washes away toxins (specifically beta-amyloid) that accumulate during the day.
The 90-Minute Cycle Rule
Your sleep isn't one long block. It occurs in cycles of roughly 90 minutes. Waking up in the middle of a deep sleep cycle causes "sleep inertia"—that heavy, groggy feeling.
Temperature is Key
Your body needs to drop its core temperature by about 2-3 degrees Fahrenheit to initiate sleep. Keep your bedroom cool (around 18°C or 65°F). If you cannot control the room temperature, take a hot shower before bed to trigger a cool-down effect.
Pro Tip: The Caffeine Curfew
Caffeine has a "half-life" of about 5-6 hours. If you drink a coffee at 4 PM, 50% of that caffeine is still in your brain at 10 PM. Stop all caffeine intake 10 hours before your planned bedtime.
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Caffeine has a "half-life" of about 5-6 hours. If you drink a coffee at 4 PM, 50% of that caffeine is still in your brain at 10 PM. Stop all caffeine intake 10 hours before your planned bedtime.