Sleep Cycle & Science
Calculate the best time to wake up based on the 90-minute sleep cycle rule.
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- ●Humans sleep in 90-min cycles. Waking up during light sleep makes you feel refreshed.
- ●Caffeine has a 6-hour half-life. Avoid it after 3 PM for better sleep quality.
- ●Blue light suppresses melatonin. Dim your screens 1 hour before bed.
- ●A drop in core body temperature signals sleep. Keep your room around 18-22°C.
- ●Includes 15 minutes to fall asleep.