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Are You Getting Enough Sleep?

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The amount of sleep a person needs depends on many factors, including age. For example, in general:

  • Infants require about 14-15 hours a day.
  • Teenagers need about 8.5-9.5 hours on average.
  • Most adults need 7 to 9 hours a night for the best amount of sleep, although some people may need as few as 6 hours or as many as 10 hours of sleep each day.
  • Women in the first 3 months of pregnancy often need several more hours of sleep than usual.

However, experts say that if you feel drowsy during the day, even during boring activities, you haven't had enough sleep.

Recommended Related to Sleep Disorders

Is It Possible to Get Too Much Sleep

By Jana Kaplan You're groggy, dizzy even. You can't see straight and you sure as hell can't keep your eyes (or your mind) focused on the screen in front of you. And you're pretty sure your boss has noticed. You want to assure her that you're not drunk and you got enough sleep. In fact, you got more than enough. Could that be the problem? The Rumor: Sleeping too much is just as bad as not sleeping enough We've all heard how important it is to get enough rest, even though most of us don't...

Read the Is It Possible to Get Too Much Sleep article > >

Sleep Deprivation Debits

The amount of sleep a person needs also increases if he or she has been deprived of sleep in previous days. Getting too little sleep creates a "sleep debt," which is much like being overdrawn at a bank. Eventually, your body will demand that the debt be repaid. We don't seem to adapt to getting less sleep than we need, while we may get used to a sleep-depriving schedule, our judgment, reaction time, and other functions are still impaired.

Consequences of Too Little Sleep

Too little sleep may cause:

  • Memory problems
  • Depression
  • A weakening of your immune system, increasing your chance of becoming sick
  • Increase in perception of pain

The Dangers of Sleep Deprivation

Many studies make it clear that sleep deprivation is dangerous. Sleep-deprived people who are tested by using a driving simulator or by performing a hand-eye coordination task perform as badly as or worse than those who are intoxicated.

Sleep deprivation also magnifies alcohol's effects on the body, so a fatigued person who drinks will become much more impaired than someone who is well rested.

Driver fatigue is responsible for an estimated 100,000 motor vehicle accidents and 1,550 deaths each year, according to the National Highway Traffic Safety Administration. Since drowsiness is the brain's last step before falling asleep, driving while drowsy can -- and often does -- lead to disaster. Caffeine and other stimulants cannot overcome the effects of severe sleep deprivation.

The National Sleep Foundation says you are probably too drowsy to drive safely if you:

  • Have trouble keeping your eyes focused
  • Can't stop yawning
  • Can't remember driving the last few miles
  • Are daydreaming and have wandering thoughts
  • Have trouble holding your head up
  • Are drifting in and out of lanes

WebMD Medical Reference

Reviewed by Melinda Ratini, DO, MS on May 16, 2014
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