Word: sleepings
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...main take-home message is that… the amount or quality of the sleep for one night is not enough to determine whether someone is fully recovered from weeks of chronic sleep deprivation,” he said...
Czeisler and his colleagues found that the body’s circadian rhythm—the natural 24-hour cycle—is actually able to partially override sleepiness during the day, which explains why some people mistakenly believe they have completely recovered lost sleep after only one or two nights of sleeping well...
...students don’t pull all nighters “out of the blue,” Czeisler said. Students are likely sleep only four to five hours a night the week leading up to exams. They may also stay up all night to finish studying right before the exam, which only burdens the already-present sleep debt even more...
...When you’re chronically sleep deprived and then you pull an all-nighter, your performance could be ten times worse than if you had been well-rested before the all-nighter,” Czeisler said. “And most likely you crash much worse at night...
...That’s enough time to run off the road into a ditch,” Czeisler said, adding that the dangers of sleep deprivation touch people ranging from truck drivers to resident physicians...