Subject: Re: What is CRON (was Elle magazine)--BMR converter

[Guest guest]

I have no idea whether this converter is accurate, but it does hold out the

prospect of being able to fine tune the extra degree of caloric expenditure our

above-BMR exertions entail:

http://www.diyglobalsolutions.com/bmr_bmi.htm

Maco

Message: 14

Date: Fri, 13 May 2005 14:14:48 -0000

From: " citpeks " <citpeks@...>

Subject: Re: What is CRON (was Elle magazine)

JW,

You ask " who cares? " . I care. I think that scientific methodology

and quantification is the difference between art and engineering. Let

us look at your own example:

At your current weight, your BMR is 1595 (not 1578) according to the

Cornell web site:

http://www-users.med.cornell.edu/~spon/picu/calc/beecalc.htm

Using multiplication factors of 1.2, 1.375, and 1.55 for sedentary,

lightly active, and moderately active, your HB caloric requirements

would be 1914, 2193, and 2472 kcal, respectively. So, if you are

eating 1800 calories and are moderately active, your percent CR is

27%, relative to your current weight.

However, you know that this is not the right weight for you. Even in

mice experiments, mice fed ad libitum don't get to eat all they want.

Researchers have been criticized for overfeeding control mice, and

the common practice now is to feed them enough so that they don't get

overweight. I think that a BMI of 22, which is the mid-point of the

normal weight range for humans is a good reference point. Never mind

that at age 20 you weighed 135 and had a BMI of 20.

For this reason, I am advocating calculating %CR relative to a control

twin with a BMI of 22. For your height, a BMI 22 corresponds to a

weight of 149 lb. The BMR of this control twin (male, 149 lb, 5'9 " ,

age 69) is 1408, and the metabolic requirements for sedentary, lightly

active, and moderately active are 1689, 1935, and 2182 kcal,

respectively. If you are eating 1800 calories and are moderately

active, your percent CR is 17% relative to your control twin

((2182-1800)/2182)*100. I think that when we are asked what percent

caloric restriction we practice, this is the figure that we should

report.

Tony

[Guest guest]

Hey. I like that. It says I'm desirable at 172#.

But it's energy req't for me is way to high for me. It's as much as 2800 kcals.

Regards.

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

From: mstewarthm@...

Sent: Friday, May 13, 2005 12:59 PM

Subject: [ ] Subject: Re: What is CRON (was Elle magazine)--BMR converter

I have no idea whether this converter is accurate, but it does hold out the prospect of being able to fine tune the extra degree of caloric expenditure our above-BMR exertions entail:http://www.diyglobalsolutions.com/bmr_bmi.htmMacoMessage: 14 Date: Fri, 13 May 2005 14:14:48 -0000 From: "citpeks" <citpeks@...>Subject: Re: What is CRON (was Elle magazine)JW,You ask "who cares?". I care. I think that scientific methodologyand quantification is the difference between art and engineering. Letus look at your own example: At your current weight, your BMR is 1595 (not 1578) according to theCornell web site:http://www-users.med.cornell.edu/~spon/picu/calc/beecalc.htmUsing multiplication factors of 1.2, 1.375, and 1.55 for sedentary,lightly active, and moderately active, your HB caloric requirementswould be 1914, 2193, and 2472 kcal, respectively. So, if you areeating 1800 calories and are moderately active, your percent CR is27%, relative to your current weight.However, you know that this is not the right weight for you. Even inmice experiments, mice fed ad libitum don't get to eat all they want.Researchers have been criticized for overfeeding control mice, andthe common practice now is to feed them enough so that they don't getoverweight. I think that a BMI of 22, which is the mid-point of thenormal weight range for humans is a good reference point. Never mindthat at age 20 you weighed 135 and had a BMI of 20.For this reason, I am advocating calculating %CR relative to a controltwin with a BMI of 22. For your height, a BMI 22 corresponds to aweight of 149 lb. The BMR of this control twin (male, 149 lb, 5'9",age 69) is 1408, and the metabolic requirements for sedentary, lightlyactive, and moderately active are 1689, 1935, and 2182 kcal,respectively. If you are eating 1800 calories and are moderatelyactive, your percent CR is 17% relative to your control twin((2182-1800)/2182)*100. I think that when we are asked what percentcaloric restriction we practice, this is the figure that we shouldreport.Tony