How Much Sleep Is Necessary?

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How much sleep is necessary?

How Much Sleep Is Necessary?

Toddlers need 11 hours of sleep every night, plus a two-hour nap during the day.
Preschoolers need 11 to 12 hours of sleep a night.
School-age children need 10 hours of sleep each night.
Teens need 9.25 hours of sleep every night. Most get less than 8.5.
Adults need about 8 hours of sleep every night. To determine exactly how much sleep you need - on a night you feel fairly rested, sleep until you wake up on your own. Feel rested? The length of the time you slept is how much sleep you need.

If you get one hour less sleep than you need each night for eight nights in a row, your brain will need sleep as desperately as if you had stayed up all night.

Source: William Dement, Stanford University Sleep Researcher

   

Comments

12/21/2007 3:08:50 AM
vikram said:

a seminal article on sleep, keep writing


1/11/2008 12:29:10 PM
JJ said:

ii don't sleep much at night. ii am a teenager and ii was looking for a chart telling me how much sleep is necessary. This was really helpful. Thanks.


5/26/2009 9:30:56 PM
George said:

This is pretty helpful and interesting- I didn't know that if you sleep 1 hour less than you need 8 nights in a row, your brain will need sleep....
That's pretty interesting.


6/9/2009 8:27:28 AM
Adrian Power said:

Good tip.

"If you get one hour less sleep than you need each night for eight nights in a row, your brain will need sleep as desperately as if you had stayed up all night."

Wow...


9/28/2009 8:25:10 PM
devendra said:

i am not sure but since 18 yrs of age to the present life of 29 yrs i agree with it


9/30/2009 1:33:57 PM
harish kale said:

here not indicates exact time which best for sound sleep. please define it




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