Body Fat and Ideal Body Weight Calculations

[Guest guest]

In a message dated 3/23/00 9:45:17 PM Eastern Standard Time,

raltman813@... writes:

<< OK, I give...What are the calculations for BF% and IBW? What do we do with

the measurements? >>

Here are the formulas that a nutritionist provided me this week for body fat

and ideal body weight (NOTE: Different Body Fat formulas for male and female):

BODY FAT PERCENTAGE: MALE (Nutritionist recommends 16% for males*)

1. Multiply your total weight by 1.082 and add 94.42

2. Multiply your waist girth by 4.15 and subtract this from step one

3. Subtract step 2 result from total weight

4. Multiply step 3 by 100 and divide by total weight.

BODY FAT PERCENTAGE: FEMALE (Nutritionist recommends 28% for females**)

1. Multiply your total weight by .732 and add 8.987

2. Measure your wrist at its widest point and divide by 3.14 (wrist diameter)

3. Multiply abdominal circumference (at belly button) by .157

4. Multiply hip circumference (at widest point) by .249

5. Multiply forearm (at widest point) by .434

6. Add totals of step 1 and step 2

7. Subtract total of step 3 from step 6

8. Subtract step 4 from step 7

9. Add step 5 to step 8

10. Subtract step 9 from your total weight

11. Multiply step 10 by 100 and divide by your total weight

* According to a chart this nutritionist provided, 16% BF% for men falls in

the good range for men under 50 years old and in the excellent range for

those 50 and over. Without providing the entire chart, the Excellent BF

values are 12% (or less) for <19, 13% for 20-29, 14% for 30-39, 15% for

40-49, and 16% for >50.

** And 28% for women falls in the moderate range for women older than 20. The

Excellent BF values are 17% (or less) for <19, 18% for 20-29, 19% for 30-39,

20% for 40-49, and 21% for >50.

IDEAL BODY WEIGHT (all body fat percentages are used as a decimal value:

e.g., 28% = .28)

1. Multiply current body weight by current body fat (as determined above).

This provides you with the weight of your body fat.

2. Subtract weight of your body fat from your current weight. The result is

your lean body weight.

3. Ideal body weight = Lean body weight/(1-desired body fat)

Example for IBW:A 165 lb. woman has a BF% of 34%. She wants to know how much

she would weigh with a BF% of 25%.

1. 165 * .34 = 56.1 fat weight

2. 165 - 56.1 = 108.9 lean body weight

3. 108.9/(1-.25) = 145.2 LB

Now that your ideal body weight has been determined, you can determine how

much more you need to lose (or gain) to attain that weight.

I cannot verify the accuracy of these formulas. But IMHO, they do seem to be

more accurate to me than the ones (at least for IBW) someone posted a website

for, based just on height and weight. If nothing else, these formulas and

their results are at least interesting. ;^)

[Guest guest]

In a message dated 3/25/00 8:13:21 PM US Eastern Standard Time,

rudnicki@... writes:

<< Where are you

other sz. 4's shopping ? >>

uh.....Newport News " small " is a 6/8. Since I need an 8/10, I don't know

what size to order!!!!! I think a 10/12 will be way too big but am afraid a

6 will squeeze the hell outa me!! I have no clue about a 4!! Sorry.

Dawn

BTC/

Dr. Batay-Csorba

4/16/99 Open RNY

BEFORE WLS: 257 lbs. 5'5 " sz 3x/24

AFTER: 142 lbs. 5'6 " (yes, I grew up LOL) sz 8/10