Why sleep cycles matter for memory
When you sleep in full 90-minute cycles, your brain processes information into long-term memory. Waking up during REM sleep can make you feel groggy even if you slept 8 hours.
Exams coming up? Learn how to use sleep cycles to memorize better and feel fresh.
Planning to sleep now?
When you sleep in full 90-minute cycles, your brain processes information into long-term memory. Waking up during REM sleep can make you feel groggy even if you slept 8 hours.
Based on data from the National Sleep Foundation regarding circadian rhythms and cognitive performance.