A bit about body fat ...
The ideal weight and fat-lean ratio varies quite a bit for men and women and
by age, but the very minimum percentage of
body fat considered safe and healthy is 5 percent for men and 12 percent
for women. The average adult body fat is closer to 15-18 percent for men and
22-25 percent for women.
Trained athletes tend to be at low end of the body fat scale due to the
increased lean weight (muscle mass) of top athletes. While low levels of body
fat seem to be related to improved performance, body composition alone can’t
guarantee sports success. For instance, a linebacker needs both lean and fat
weight to generate a crushing tackle. Body fat among elite athletes varies, but
there is little evidence of benefit when men drop under 8 percent and women
drop under 14 percent.
There are several different methods of assessing the percent of fat and lean
mass of an individual. These methods are referred to as Body Composition
Analysis.
Most physiologists use simple
skinfold measurements to determine body fat percent. The American
College of Sports Medicine says
that when performed by a trained, skilled, tester, they are up to 98% accurate.
Bioelectrical Impedance is another method of assessing body fat percentage.
There are varieties available that provide more than just body fat
measurements. These devices can determine weight, the percent and amount of
body fat, muscle mass, water, and even bone mass.
Try an online version:
http://www.healthcentral.com/cholesterol/home-body-fat-test-2774-143.html?ic=4029
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I found a quick vid all about this subject ...