Body Circumferences

A cloth or non-elastic metric measurement tape must be used. When measureing, pull the tape tight enough to keep it in position without causing an indentation of the skin.

Measurements are then taken from the following locations:

Body Area Position Anatomic Site
Abdomen Horizontal Maximum anterior protuberance of abdomen, usually at the umbilicus
Hips (buttocks) Horizontal Maximum posterior extension of the buttocks
Iliac Horizontal Level with the iliac crests
Waist Horizontal Narrowest part of the torso, level with the natural wiast between the ribs and iliac crest

When you have the measurements you then need to work out your Body Density using one of the following formulas.

BD for Men = 1.21142 + (0.00085 x weight (kg)) - (0.00050 x iliac (cm)) - (0.00061 x hip (cm)) - (0.00138 x abdomen (cm))

or

BD for Women = 1.168297 - (0.002824 x abdomen (cm)) + (0.0000122098 x abdomen˛ (cm)) - (0.000733128 x hip (cm)) + (0.000510477 x height (cm)) - (0.000216161 x age)

Body density can then be converted to percent fat by using the following formula:

Men (Fat%) = ((4.95 / BD) - 4.5) x 100

or

Women (Fat%) = ((5.01 / BD) - 4.57) x 100

You can then use the following table to see the general body fat percentage categories for men and women based on age.

Men
Classification 20-39 years 40-59 years 40-79 years
Underweight < 8% < 11%> < 13%
Normal 8 - 19% 11 - 21% 13 - 24%
Overweight 20 - 24% 22 - 27% 25 - 29%
Obese > 25% > 28% > 30%


Women
Classification 20-39 years 40-59 years 40-79 years
Underweight < 21% < 23% < 24%
Normal 21 - 32% 23 - 33% 24 - 35%
Overweight 33 - 38% 34 - 39% 36 - 41%
Obese > 39% > 40% > 42%

Circumference measures are easily used to assess body composition. To ensure accuracy, you must use anatomical landmarks for taking each measurement.

Body Circumferences

Circumference measures are easily used to assess body composition. To ensure accuracy, you must use anatomical landmarks for taking each measurement.

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