Scientists study the brain activity of people who claim to be able to do just fine on five hours or less sleep per night. Research finds that these people might be more efficient than the rest of us at performing the memory consolidation that sleep provides. They might also be falling asleep for a minute or two at a time when things get boring. And maybe these short sleepers are just kidding themselves about how they function well on very little sleep.
I need more sleep than I’d like. Sunday, Monday, and Tuesday nights I got four to five hours of sleep per night, and suffered for it. By Thursday and Friday I was a wreck. Last night I slept eleven hours and today it feels like my brain is packed in cotton.