Thursday, February 21, 2008

Do You Really Need Seven Hours of Sleep?

By Temma Ehrenfeld | Newsweek Web Exclusive

Yep, you do. Although people do vary in how much sleep they need, the differences are slight, and the vast majority of us (including seniors) need seven to eight hours. Most people who regularly get less than seven hours of rest are simply unaware of the damage that fatigue and sleepiness is doing to their bodies. Chronic "short-sleepers," as scientists call them, have forgotten what it feels like to be well-rested, says Robert Rosenberg, medical director of the Sleep Disorders Center of Prescott Valley, in Arizona.

The evidence indicates that a person who regularly sleeps less than seven hours a night functions as badly as someone who hasn't slept for one to three days, according to a research review published in the Journal of Clinical Sleep Medicine last year. Furthermore, the largest current longitudinal studies (one involving 21,268 people and another 10,308) showed that sleep-deprivation increased mortality: the chance of dying younger than people of the same age, gender and health-risk factors. In the larger study researchers at the Finnish Institute of Occupational Health assessed the sleep habits of the group in 1975 and 1981 and then checked to see who was still alive on Dec. 31, 2003. After comparing subjects' survival rates to the average for people of the same age (and adjusting for other known death risks, like smoking), the researchers concluded that lack of sleep increased mortality in the study participants by 26 percent for men and 21 percent for women. The cause of death might be accidents, or diseases exacerbated by sleep-deprivation. Other current research indicates that lack of sleep affects the body's hormones, immune system and metabolism; hence, it can be a risk factor for obesity, diabetes and heart disease.

To evaluate the quality of your own sleep—and whether you're getting enough—try these tools offered by the American Academy of Sleep Medicine


Duongchan said...

This is very useful. But what about extra sleep???

jappy said...

That will absolutely increase the mortality :)

Duongchan said...

Oh dear... I sleep more than 10 hours
when I have nothing to do and wake up with extremely good mood and healthy... Let's see whether or not I can live a long life...haha. I will prove that your idea is completely wrong, lolz.

jappy said...

yes, but it's a long-term experiment. Let's wait and see. Hope you will tell me the result 30 years later.

Duongchan said...

How if next 30 years I come and you're gone? lolz

jappy said...

Then, I'll sleep more after I've gone :)

Anonymous said...


どりてぃんドリーム said...


猫背 said...

旅費が浮くどころか遊びまくったよヽ( ・∀・)ノ

sovann said...


I dont know why we need seven hour of sleep. My boss said he sleep only 3-4 hour a day. I tried that too, but it does not work, so I keep wondering that he is lying to me.

Napoleon said "sleep 6 hours for men, 7 for women/child, 8 for the fools" I guess he is right because he has lots of thing to do that he can't just sleep. Yet for average people like us more than 7 hours is not bad (long live or not I cant guarentee).

I would say I agree to both. By the way, I guess that god already calculate this right. Why need an experiment?


くれくれ厨 said...

金持ちってスゲー( ゚д゚)ポカーン

大 乱 交スマッシュブ ラジャーズ said...

ちょww 普通のロー○。ンをあんな風に使うなんてどういうテクしてんだよww

ヒットエンドぴゅっ! said...


金太郎 said...

まさか家のエレベーターでフ ェ ラされるなんて思ってなかったよ。。ww
「ここでフ ェ ラさせてくれたらもっと報 酬あげるよ♪」

管理人 said...


パイパソ専門 said...

1 0 万 もらえたからいいものの、大事な息子はまだジンジンしてまふww(・w・)

MeToYou said...

Hey.. how are U doing for long time???? ..lolz..

Well.. it is useful but i sleep more that 7hrs.. :D:D

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Anonymous said...

Hello, brother! How are you? Long time no update...busy?

jappy said...

thanks for awaiting to see my space :) almost 1 year, I been away. The reason is simply, dont know what to post :)

Anonymous said...

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