"Weighing body fat"

[yared22311]

Weighing body fat Hydrodensitometry, or hydrostatic weighing,
is considered to be the gold standard in the health and
fitness fields for its accuracy and is used mainly for
research, though it is costly and time-consuming. at
http://www.washtimes.com/metro/20050103-095927-1425r.htm

[Kamalakar]

"yared22311" <yared22311@yahoo.com> wrote in message
news:1104846893.282770.259180@z14g2000cwz.googlegroups.com

> Weighing body fat Hydrodensitometry, or hydrostatic
> weighing, is considered to be the gold standard in the
> health and fitness fields for its accuracy and is used
> mainly for research, though it is costly and time-consuming.
> at http://www.washtimes.com/metro/20050103-095927-1425r.htm

Is there an affordable domestic meter which can monitor the
body weight , bone , muscle and fat ? How much does it cost ?

Kam

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[markd]

" Is there an affordable domestic meter which can monitor the
body weight , bone , muscle and fat ? How much does it cost ?"

The techniques mentioned in the original consist of putting a
person in a tank of water. Because fat and other body parts
have different specific gravities the amount of body fat can
be measured by the differences in flotation measured for one's
dry weight. There are calipers to measure fat folds in certain
body areas and an electrical based meter that measures body
resistance because fat has a different resistance to current
then does other body parts. For general purposes one can use
the body mass index which compares one's statistical ratio of
weight to height, which reflects percent of body fat. See to
calculate it for yourself:

http://nhlbisupport.com/bmi/bmicalc.htm

The standard tables and formulas one sees on the web are not
accurate for people from s. asia. Research done shows that a
bmi of 25 is the upper range for a normal weight/height ratio
for most of the world's population but something like 23 for
those from s. asia. These numbers reflect where risk factors
start to rise for various diseases/disorders when the bmi
exceeds those numbers.

[Adam Becke]

How do those calculations work? Seems to me that you've got
four variables - the masses of 1) fat, 2) bone, 3) muscle, 4)
water. You've got two variables 1) weight of the body, 2)
volume of the body. (The bouyant weight of the body can be
calc'd from those two.) Doesn't seem like you've got enough
measurements to fix the bodyfat percentage. Of course, you can
make assumptions like assuming a bone mass for a given height,
but that seems fraught with error. Adam Becker

[Kamalakar]

"markd" <markd@toad-net.com> wrote in message
news:41dae96a$0$63175$4d5ecec7@reader.city-net.com

> http://nhlbisupport.com/bmi/bmicalc.htm
>
> The standard tables and formulas one sees on the web are not
> accurate for people from s. asia. Research done shows that a
> bmi of 25 is the upper range for a normal weight/height
> ratio for most of the world's population but something like
> 23 for those from s. asia. These numbers reflect where risk
> factors start to rise for various diseases/disorders when
> the bmi exceeds those numbers.

Good , thanks but when a person is loosing weight how does he
know what he is loosing - bone , muscle or fat ?

Kam

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[Pete]

<markd@toad-net.com> wrote in message
news:41dae96a$0$63175$4d5ecec7@reader.city-net.com...

> For general purposes one can use the body mass index which
> compares one's statistical ratio of weight to height, which
> reflects percent of body fat. See to calculate it for
> yourself:

BMI is an unreliable method of determining bodyfat percentage.
One may have a low BMI while having a high percentage of
bodyfat. Conversely, someone with a BMI considered "obese" may
have a very low bodyfat percentage. My BMI, for example, is
30. This qualifies as "obese". However, my bodyfat percentage
(as determined by hydrostatic weighing) is 14%, a quite
"healthy" number.