sleep deprivation and hormonal disruption

[Guest guest]

I can't remember where I got this -- but I find it explosive in its

implications. If you've already seen it -- oops. If not I think you'll find

it interesting. It's about a Lancet article from 1999.

 

  

Lack Of Sleep Alters Hormones, Metabolism

CHICAGO, IL--- October 22, 1999 -- Chronic sleep loss can reduce the capacity

of even young adults to perform basic metabolic functions such as processing

and storing carbohydrates or regulating hormone secretion, report researchers

from the University of Chicago Medical Center in the October 23 issue of The

Lancet.

 

Cutting back from the standard eight down to four hours of sleep each night

produced striking changes in glucose tolerance and endocrine function-changes

that resembled the effects of advanced age or the early stages of

diabetes-after less than one week.

 

Although many studies have examined the short-term effects of acute, total

sleep deprivation on the brain, this is the first to investigate the impact

of chronic, partial sleep loss on the body by evaluating the metabolism and

hormone secretion of subjects subjected to sleep restriction and after sleep

recovery.

 

" We found that the metabolic and endocrine changes resulting from a

significant sleep debt mimic many of the hallmarks of aging, " said Dr. Eve

Van Cauter, professor of medicine at the University of Chicago and director

of the study. " We suspect that chronic sleep loss may not only hasten the

onset but could also increase the severity of age-related ailments such as

diabetes, hypertension, obesity .... for rest of the article go to:

 

http://www.pslgroup.com/dg/13d2f2.htm

 

Namaste, Liz

<A HREF= " http://www.csun.edu/~ecm59556/Healthycarb/index.html " >

http://www.csun.edu/~ecm59556/Healthycarb/index.html</A>

[Guest guest]

Very interesting piece. But, as usal, short on clear answers about " dose. "

Subjects were tested with sleep periods of: 4 hrs, 8 hrs, and 12 hrs. 4

hours seems an absurdly short sleep period, whereas 12 hours seems absurdly

long. But that leaves a huge range.

Most of us will not likely sleep much over 8 hours. The question remains,

how much over 4 hours, through to around 8 hours is a desirable range for

good health results? Will 5 hours do the job. It seems unlikely. But how

about 6 hours, or 7 hours?

Until a while back, I'd been going on 5 hours, and suffering for it (though

I continue to hear of people that claim to do very well on 5 hours). More

recently I got that up to 6 hours, and am starting to get 7 or more hours.

But at this point, I honestly can't tell the difference, subjectively,

between 6, 6 & 1/2, 7, or 7 & 1/2 hours, which is why I wish the Lancet

article had been more dose specific.

-

<Ecmillerreid

<ginmee; <Catherinepaint; <JCROWLEYARCH;

<DornaLarry; <acduggan; <EvasiveEye;

; <cjheiss;

<Carol.koprowski; <LOWCARB-LIST;

<miller_lana; <Optimal_Health_and_Longevity >;

<PALEOFOOD

Wednesday, September 25, 2002 12:21 AM

sleep deprivation and hormonal disruption

 

 

I can't remember where I got this -- but I find it explosive in its

implications. If you've already seen it -- oops. If not I think you'll find

it interesting. It's about a Lancet article from 1999.

 

 

Lack Of Sleep Alters Hormones, Metabolism

CHICAGO, IL--- October 22, 1999 -- Chronic sleep loss can reduce the

capacity

of even young adults to perform basic metabolic functions such as processing

and storing carbohydrates or regulating hormone secretion, report

researchers

from the University of Chicago Medical Center in the October 23 issue of The

Lancet.

 

Cutting back from the standard eight down to four hours of sleep each night

produced striking changes in glucose tolerance and endocrine

function-changes

that resembled the effects of advanced age or the early stages of

diabetes-after less than one week.

 

Although many studies have examined the short-term effects of acute, total

sleep deprivation on the brain, this is the first to investigate the impact

of chronic, partial sleep loss on the body by evaluating the metabolism and

hormone secretion of subjects subjected to sleep restriction and after sleep

recovery.

 

" We found that the metabolic and endocrine changes resulting from a

significant sleep debt mimic many of the hallmarks of aging, " said Dr. Eve

Van Cauter, professor of medicine at the University of Chicago and director

of the study. " We suspect that chronic sleep loss may not only hasten the

onset but could also increase the severity of age-related ailments such as

diabetes, hypertension, obesity .... for rest of the article go to:

 

http://www.pslgroup.com/dg/13d2f2.htm

 

Namaste, Liz

<A HREF= " http://www.csun.edu/~ecm59556/Healthycarb/index.html " >

http://www.csun.edu/~ecm59556/Healthycarb/index.html</A>

 

 

Getting well is done one step at a time, day by day, building health

and well being.

 

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moderator ....... Gettingwell-owner

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[Guest guest]

-

" John Polifronio " <counterpnt

 

Wednesday, September 25, 2002 10:15 PM

Re: sleep deprivation and hormonal disruption

 

 

> Very interesting piece. But, as usal, short on clear answers about

" dose. "

> Subjects were tested with sleep periods of: 4 hrs, 8 hrs, and 12

hrs. 4

> hours seems an absurdly short sleep period, whereas 12 hours seems

absurdly

> long. But that leaves a huge range.

> Most of us will not likely sleep much over 8 hours. The question

remains,

> how much over 4 hours, through to around 8 hours is a desirable

range for

> good health results? Will 5 hours do the job. It seems unlikely.

But how

> about 6 hours, or 7 hours?

> Until a while back, I'd been going on 5 hours, and suffering for it

(though

> I continue to hear of people that claim to do very well on 5

hours). More

> recently I got that up to 6 hours, and am starting to get 7 or more

hours.

> But at this point, I honestly can't tell the difference,

subjectively,

> between 6, 6 & 1/2, 7, or 7 & 1/2 hours, which is why I wish the

Lancet

> article had been more dose specific.

 

I remember reading somewhere (sorry -- no idea where) that

our agricultural ancestors of a century or more ago living in the

Northern US, used to sleep 8 hours a night in summer months when days

were long & there was plenty of work to do, but tended more to 12

hours sleep a night during the winter months. Candles & oil lamps

are expensive to burn many hours a night. Not much to do sitting

around in the dark.

 

I have heard elsewhere (again, no references) that 8-10 hour

sleep per night is far better than 7. No idea if this was just

speculation, or the result of any actual studies. I used to need at

least 10 hours a night. But since stopping all sugar & giving up

most carbohydrates (other than limited fruit & non-starchy veggies),

I seem to need 6-7 hours a night plus a short nap of 15 minutes to an

hour about 6-7 hours after I first get up.

 

Alobar

[Guest guest]

If you liked the connection to hormonal disruption and sleep, you may find some

of the following interesting. Sleep is very important to ones health. Sleep

researchers have established the last few years that growth hormones are

produced during sleep, abnormal or short sleep can reduce their production thus

lending to short people as kids need at least 9+ hours to grow properly. The

most important gain in knowledge I think has been that the immune system

functions during sleep - this includes the production of the cells that fight

cancer. Good health is not simply about eating right, it is about eating,

sleeping and exercise. Sleep is an area worth reading about - there is tons of

new info on it.

 

Brain Activity Is Visibly Altered Following Sleep Deprivation

http://www.sciencedaily.com/releases/2000/02/000209215957.htm

 

Sleep Deprivation Promotes Insulin-Resistance

http://diabetes.about.com/library/blnews/blnsleep601.htm

 

Sleep Deprivation, Psychosis and Mental Efficiency

http://www.mhsource.com/pt/p980301b.html

 

Partial night sleep deprivation reduces natural killer and cellular immune

responses in humans

http://www.faseb.org/fj/apr1996/irwin.htm

 

Sleep deprivation elevates plasma corticosterone levels in neonatal rats.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve & db=PubMed & list_uids=1\

1711207 & dopt=Abstract

 

 

 

-

Ecmillerreid

ginmee ; Catherinepaint ; JCROWLEYARCH ;

DornaLarry ; acduggan ; EvasiveEye ;

Gettingwell ; cjheiss ; Carol.koprowski ;

LOWCARB-LIST ; miller_lana ;

Optimal_Health_and_Longevity ; PALEOFOOD

Wednesday, September 25, 2002 2:21 AM

sleep deprivation and hormonal disruption

 

 

I can't remember where I got this -- but I find it explosive in its

implications. If you've already seen it -- oops. If not I think you'll find

it interesting. It's about a Lancet article from 1999.

 

 

Lack Of Sleep Alters Hormones, Metabolism

CHICAGO, IL--- October 22, 1999 -- Chronic sleep loss can reduce the capacity

of even young adults to perform basic metabolic functions such as processing

and storing carbohydrates or regulating hormone secretion, report researchers

from the University of Chicago Medical Center in the October 23 issue of The

Lancet.

 

Cutting back from the standard eight down to four hours of sleep each night

produced striking changes in glucose tolerance and endocrine function-changes

that resembled the effects of advanced age or the early stages of

diabetes-after less than one week.

 

Although many studies have examined the short-term effects of acute, total

sleep deprivation on the brain, this is the first to investigate the impact

of chronic, partial sleep loss on the body by evaluating the metabolism and

hormone secretion of subjects subjected to sleep restriction and after sleep

recovery.

 

" We found that the metabolic and endocrine changes resulting from a

significant sleep debt mimic many of the hallmarks of aging, " said Dr. Eve

Van Cauter, professor of medicine at the University of Chicago and director

of the study. " We suspect that chronic sleep loss may not only hasten the

onset but could also increase the severity of age-related ailments such as

diabetes, hypertension, obesity .... for rest of the article go to:

 

http://www.pslgroup.com/dg/13d2f2.htm

 

Namaste, Liz

<A HREF= " http://www.csun.edu/~ecm59556/Healthycarb/index.html " >

http://www.csun.edu/~ecm59556/Healthycarb/index.html</A>