The Risks of Sleep Debt

"For years, sleep researchers have been preaching the dangers of lost sleep: People who are fatigued can't pay attention to routine tasks, have trouble learning and are prone to a laundry list of health problems, from depression to high blood pressure," says Kathleen Facklemann in USA Today

"New research suggests an added risk to losing sleep day after day: Humans and animals that have chronic sleep deprivation might reach a point at which the very ability to catch up on lost sleep is damaged, according to Fred Turek, a sleep researcher at Northwestern University in Evanston, Illinois."

"His research on sleep patterns in rats appeared this summer in the Proceedings of the National Academy of Sciences. That, together with findings from a human study, suggests people who lose sleep night after night might not recover the alertness they need to perform well during the day. So far the studies don't tell researchers whether the damage is permanent. But they do suggest that people who go to work fatigued day after day might perform consistently at a subpar level.