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Harvard Sleep Game


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Harvard Sleep Game


Think Fast!

Sleep Loss Clouds Judgment

Most adults need 7-8 hours' sleep per day, ideally at night, for optimal alertness. Railroaders often may not be able to get that much sleep in their longest period of sleep. They can boost alertness with naps, however. People who get less sleep than they need often complain of feeling wiped out.

After a day or two of not getting enough sleep, most people recognize that they feel cranky, foggy, and clumsy. They may have trouble with concentration and memory. Their reaction time slows.

If people miss sleep several days in a row, these problems typically increase. Sleepy people often do not realize how fatigued they are, and how poorly they perform at work or behind the wheel. Sleep deprivation undermines the ability to pay attention, retain information and process it, make decisions, and manage other aspects of complex thinking.

Sleep Deprivation and Judgment (01:01)
Christopher Landrigan, MD, MPH, of Harvard, tells how sleep loss keeps you from realizing how sleepy you are.
Sleep Deprivation and Judgment

Drowsy or Drunk?
Both States Slow Reaction Time and Judgment

After 16 hours of wakefulness, performance slips.

People who took a driving test after 17-19 hours awake performed as badly as or worse than people with a blood-alcohol level of 0.05 percent, the legal cut-off for being considered drunk in most western European countries. At this level of impairment, an individual's reaction time is about 50 percent slower than that of a well-rested person.

People who took a driving test after staying awake for 24 hours performed as poorly as people with a blood-alcohol level of 0.10 percent. This blood-alcohol level is only slightly above 0.08 percent, the current legal limit for alcohol intoxication in the United States. 1

Tired drivers, like those who are drunk, lose not only their ability to drive safely, but also to recognize how impaired they are.2

Sleep and Memory (01:10)
Robert Stickgold, PhD, of Harvard, tells how sleep helps you learn facts and remember them.
Sleep and Memory


A resource from the Division of Sleep Medicine at
Harvard Medical School

Sponsored by the Federal Railroad Administration, an operating mode of the U.S. Department of Transportation

Produced in partnership with WGBH Educational Foundation and the
John A. Volpe National Transportation Systems Center

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  • dMog


  • Ambrocious


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Plenty of sleep, nice fresh water in abundance, and proper nutrition all play part in a healthy life. I myself suffer from sleeping problems, having been diagnosed with sleep apnea in 2008, it's not easy to get restful nights of sleep, even with a CPAP.

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lots on alternative medicine out there for sleep apnea to work in consort with your oxygen...some it garbage and quackery but some of it really good...do a bit of googling on acupuncture and massage therapy

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