Sports are very concerned about their weight. But it does not mean much as long as one does not differ from that of fat muscles. How? Read more: http://bit.ly/1EfQc9Y

1. The equations of fat
Sports are very concerned about their weight. But it does not mean much as long as one
does not differ from that of fat muscles. How?
To understand the irrelevance of the only weight criterion for judging a template, just
compare two 120 pounds to 1.80. One can be downright obese, the other pillar of rugby.
The proportion of fat in fact varies from 5 to 50% of body weight in different individuals. Can
be calculated precisely this distribution dissected after death. For live, it obviously makes
less directly. The reference method is the hydrostatic weighing. It is based on the famous
Archimedes principle: a body immersed in a liquid undergoes from one vertical thrust
upwards equivalent to the weight of the displaced fluid. Weighed the person in the water,
then, out of the water and its density is calculated according to the formula: density = 1 +
weight water / weight out of the water. The result depends on the composition of the body.
It is known that fat has a density (0.901 g / cm3) significantly lower than that of the muscle
(1.10 g / cm3). Conversion tables then give body fat levels. This method nevertheless
contains a number of errors. Recent studies indicate that indeed the density of lean body
mass varies with age, sex, degree of shape and ethnicity. Finally, hydrostatic weighing is a
last problem: the air contained in the lungs. The underwater weighing must be done after
emptying air from the lungs in a tuba case. It also recommends to repeat the experiment
several times during the same session.
The body fleet
Another technique, called hydrometric gives very close to the actual values results. She is
interested in the water content of the body. For this, we measure the hydrogen isotopes in
biological fluids: saliva, urine, plasma. Concentration reflects the total amount of hydrogen
in the body. This data is used to determine the proportion of fat to the extent that the
adipose tissue is specifically devoid of any liquid. For a given weight, there will be even less
of fat that can be water, and vice versa. A method that takes into account the permeability
of the body to electromagnetic waves. It is commercially available devices that can perform
this type of testing. The slightly different depending on the tissue allows conduction again to
assess body fat with acceptable accuracy.
Body blowdry
Finally some experts are still based on the technique called adipose folds imagined by Brozek
in 1963 and improved later by Jackson Pollock. It is based on a finding of a biblical simplicity.
It is known that the fat is stored mainly in the skin, that is to say, in the dermis, a layer which
can be easily pinched in evaluation purposes. Measuring instruments then give the thickness

2. of the fold to the millimeter. Is repeated in different places of the body and it then uses
extrapolation formulas to determine the total amount of fat in the body. The validity of the
results, however, depends largely on the quality of the equipment and the experience of the
user.
Syndrome triathlete
In conclusion, remember that these measures are useful at the individual level, to know
where one is in the fight against overweight. If the methods are not available as is 100%
reliable, there is no reason to make a cheese. Ultimately, we even see some danger to have
too powerful tools. Sports have too often consider their fat as an unnecessary burden and
correlating performance and weight. Call it the "syndrome triathlete." They come to forget
some essential truths: first, that the proportion of fat depends largely on genetic factors. On
the other hand, that fats are useful in many fields: hormone production, immunity,
protection against cold and shock, energy intake, etc. Exclude all fat ?? and you will
disappear with them.
Read more: http://bit.ly/1EfQc9Y