Re: Water-Induced Thermogenesis

[Guest guest]

I've heard of this. In fact, rumour has it that an old weight-control trick of supermodels is to drink ice-water because of the calorie-burning effect of replacing the heat lost to the cold water. I don't remember where I read this, but they believe that an 8-oz glass of ice-water "burns" 40 calories.

I guess we should not overdo water along with everything else if we want to keep our calorie needs low.

I find it interesting that the latest word on water is simply to drink when you are thirsty and not worry about x number of glasses per day.

chrisdrsusanforshey <drsusanforshey@...> wrote:

This is first I've heard of this.Drinking 500 ml of water increased metabolic rate by 30%. The increaseoccurred within 10 min and reached a maximum after 30–40 min. Thetotal thermogenic response was about 100 kJ. About 40% of thethermogenic effect originated from warming the water from 22 to 37 C.In men, lipids mainly fueled the increase in metabolic rate. Incontrast, in women carbohydrates were mainly used as the energy source. Thus, drinking 2 liters of water per day would augment energyexpenditure by approximately 400 kJ.Full Text:http://jcem.endojournals.org/cgi/content/full/88/12/6015__________________________________________________

[Guest guest]

Hi Chris:

There was also a Seventh Day Adventist study which purported to show

that drinking relatively large amounts of water considerably improved

lipids values. In effect, diluted them. I use the word 'purported'

because there are a number of 'beliefs' SDAs have about nutrition

from way back that they would just love to prove to be true

scientifically. This is one of them, so it might, just possibly,

introduce a source of bias.

It is always preferable to see reported effects confirmed by other

unrelated investigators. But especially so when an investigator who

has a long held, but previously scientifically unsubstantiated, view

claims to have done the work to prove it really is true.

A bit like the people whose livelihoods depend on the sales of

exercise equipment coming out with a study which supposedly

demonstrates that exercise prevents and cures everything.

Rodney.

> This is first I've heard of this.

>

> Drinking 500 ml of water increased metabolic rate by 30%. The

increase

> occurred within 10 min and reached a maximum after 30–40 min. The

> total thermogenic response was about 100 kJ. About 40% of the

> thermogenic effect originated from warming the water from 22 to 37

C.

> In men, lipids mainly fueled the increase in metabolic rate. In

> contrast, in women carbohydrates were mainly used as the energy

source.

>

> Thus, drinking 2 liters of water per day would augment energy

> expenditure by approximately 400 kJ.

>

> Full Text:

>

> http://jcem.endojournals.org/cgi/content/full/88/12/6015

>

>

>

>

> ---------------------------------

>

[Guest guest]

>>> This is first I've heard of this.

Ellington Darden, who is some what famous in the body building world, for his

work with Arthur , inventor of Nautalus, and his studies on High Intensity

Training, promoted the concept as part of his program and called it

superhydration. He used to maintain a website called ClassicX which seems to be

down now where he had his articles on it. I did find an old article he wrote on

it that I have (though I dont know what his references for this were.) and this

is the part on water..

Cold-water connection

Have you ever wished for a food that supplies negative calories? Let's say such

a food exists and it contains a minus 100 calories per serving. Any time you

feel like a piece of chocolate cake or a donut, all you have to do to compensate

is simply follow the sweet with two servings of the negative-calorie food.

Prestoplus 200 calories and minus 200 calories yields 0 calories. While no

negative-calorie food exists in science, ice-cold water has a similar, but

smaller, effect inside your body.

When you drink chilled water, which is about 40 degrees Fahrenheit, your system

has to heat the fluid to a core body temperature of 98.6. This process requires

almost 1 calorie to warm each ounce of cold water to body temperature. Thus, an

8-ounce glass of cold water burns approximately 8 calories, or 7.69 to be exact.

Extend that over 16 glasses, 128 ounces, or one gallon, and you've generated 123

calories of heat energy, which is significant.

There's real calorie-burning power in cold water. A professor of biology from

the University of Florida added to my understanding of the cold-water connection

when he pointed out that melting ice and a burning candle both require the

transfer of heat. They simply modify their forms. The ice changes from solid to

liquid, and the candle from solid to gas. Both transfers, or changes, involve

heat.

[Guest guest]

I recall getting excited about this years ago when an unsuccessful dieter.

True it takes 1 calorie to raise 1 gram of water 1' C. But the calories in food we talk about are

kilo-calories so make that 1/1000 th of a food Cal or 1000g of water. We need to consume liters

of cold water to cancel a few grams of food.

So yes it makes a difference in the margin, but its small numerically.

JR

-----Original Message-----From: [mailto: ]On Behalf Of chrisSent: Thursday, June 23, 2005 2:01 AM Subject: Re: [ ] Water-Induced Thermogenesis

I've heard of this. In fact, rumour has it that an old weight-control trick of supermodels is to drink ice-water because of the calorie-burning effect of replacing the heat lost to the cold water. I don't remember where I read this, but they believe that an 8-oz glass of ice-water "burns" 40 calories.

I guess we should not overdo water along with everything else if we want to keep our calorie needs low.

I find it interesting that the latest word on water is simply to drink when you are thirsty and not worry about x number of glasses per day.

chrisdrsusanforshey <drsusanforshey@...> wrote:

This is first I've heard of this.Drinking 500 ml of water increased metabolic rate by 30%. The increaseoccurred within 10 min and reached a maximum after 30–40 min. Thetotal thermogenic response was about 100 kJ. About 40% of thethermogenic effect originated from warming the water from 22 to 37 C.In men, lipids mainly fueled the increase in metabolic rate. Incontrast, in women carbohydrates were mainly used as the energy source. Thus, drinking 2 liters of water per day would augment energyexpenditure by approximately 400 kJ.Full Text:http://jcem.endojournals.org/cgi/content/full/88/12/6015

__________________________________________________

[Guest guest]

1 cup of water is approx. 250 ml (or 250 g)

From freezing to body temperature is 37 deg C.

250 * 37 = 9250 or about 9 kilocalories

1 gal is 16 cups or 144 kilocalories (food calories)

So it's more than the calories in a 'few grams' of food, but not a huge

amount.

I remember this as part of a discussion over whether to drink room temp

water or ice water. On the other hand, in " French Women Don't Get Fat "

the author contends that Americans don't drink as much water as they

should because they insist on drinking it cold, and it's not

necessarily pleasant. You'd get about a third of the above calorie

burn from drinking room temperature water, apart from any other effects.

Iris

[Guest guest]

I believe you have made my point.

Drinking one cup of ice water will burn all of 1 gram of fat.

Drinking one gallon of ice water is preposterous, and probably dangerous.

JR

-----Original Message-----

From:

[mailto: ]On Behalf Of oc9

Sent: Friday, June 24, 2005 5:30 PM

Subject: [ ] Re: Water-Induced Thermogenesis

1 cup of water is approx. 250 ml (or 250 g)

From freezing to body temperature is 37 deg C.

250 * 37 = 9250 or about 9 kilocalories

1 gal is 16 cups or 144 kilocalories (food calories)

So it's more than the calories in a 'few grams' of food, but not a huge

amount.

I remember this as part of a discussion over whether to drink room temp

water or ice water. On the other hand, in " French Women Don't Get Fat "

the author contends that Americans don't drink as much water as they

should because they insist on drinking it cold, and it's not

necessarily pleasant. You'd get about a third of the above calorie

burn from drinking room temperature water, apart from any other effects.

Iris

[Guest guest]

> 1 gal is 16 cups or 144 kilocalories (food calories)

Yes, but I wonder if our bodies need to actually generate all the

additional heat (144 kcal in this case) needed to warm the water

since they are already getting rid of thermal energy all the time

anyway.

Tom

[Guest guest]

You are right Tom,

While the heat required to heat one gram of water one degree Celsius

is one calorie (with small c), the heat require to EVAPORATE one gram

of water is 539 calories. Sweating one gram of water and having it

evaporate on the skin will cool you a lot more than drinking cold water.

Tony

--- In , <tomrscott@w...>

wrote:

>

> > 1 gal is 16 cups or 144 kilocalories (food calories)

>

> Yes, but I wonder if our bodies need to actually generate all the

> additional heat (144 kcal in this case) needed to warm the water

> since they are already getting rid of thermal energy all the time

> anyway.

>

> Tom