Body fat percentage

body fatfat masspercentage body fatBFPskinfold thicknessbody fat contentbody fat countbody fat ratiobody fat to weight ratioestimation of body fat
The body fat percentage (BFP) of a human or other living being is the total mass of fat divided by total body mass, multiplied by 100; body fat includes essential body fat and storage body fat.wikipedia
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Obesity

obesemorbidly obeseoverweight
BMI is closely related to both percentage body fat and total body fat.

Body composition

fat free massbody composition monitorsfat-free mass
The body fat percentage is a measure of fitness level, since it is the only body measurement which directly calculates a person's relative body composition without regard to height or weight.
A reasonably accurate estimation of body fat can be obtained by means of a "two compartment model" of the human body which is based upon two simplifying assumptions: 1. Human fat has a density of 0.9 grams/ml, and 2.

Bioelectrical impedance analysis

bioimpedancebioimpedance analysis
A number of methods are available for determining body fat percentage, such as measurement with calipers or through the use of bioelectrical impedance analysis.
Body fat percentage

Body mass index

BMIbody mass index (BMI)body-mass index
The widely used body mass index (BMI) provides a measure that allows the comparison of the adiposity of individuals of different heights and weights.
Using body fat percentages (BF%), however, BF-defined obesity was found in 50% of men and 62% of women.

Classification of obesity

Body Volume Indexbody mass indexBVI
Classification of obesity
Relative weight and body mass index (BMI) are nearly identical and are reasonable estimates of body fatness as measured by percentage body fat.

Pinch (action)

pinchpinchingfinger pinch
The skinfold estimation methods are based on a skinfold test, also known as a pinch test, whereby a pinch of skin is precisely measured by calipers, also known as a Plicometer, at several standardized points on the body to determine the subcutaneous fat layer thickness.
Body fat percentage can be determined the skinfold test, in which a pinch of skin is precisely measured by calipers at several standardized points on the body to determine the subcutaneous fat layer thickness. These measurements are converted to an estimated body fat percentage by an equation.

Relative Fat Mass

Relative Fat Mass (RFM)
RFM is a simple anthropometric procedure that is claimed to be more convenient than body fat percentage and more accurate than the traditional body mass index (BMI).

Adipose tissue

adiposebody fatfat
The body fat percentage (BFP) of a human or other living being is the total mass of fat divided by total body mass, multiplied by 100; body fat includes essential body fat and storage body fat. Storage body fat consists of fat accumulation in adipose tissue, part of which protects internal organs in the chest and abdomen.
Different meters use various methods to determine the body fat to weight ratio.

Lizzie Velásquez

Lizzie Velásquez, a woman with "zero percent body fat"
She has never weighed more than 29 kg (64 lbs), and reportedly has almost 0% body fat.

Human body weight

body massbody weightweight
The body fat percentage (BFP) of a human or other living being is the total mass of fat divided by total body mass, multiplied by 100; body fat includes essential body fat and storage body fat.

Pregnancy

pregnantfirst trimesterpregnant women
The percentage of essential body fat for women is greater than that for men, due to the demands of childbearing and other hormonal functions.

Organ (anatomy)

organorgansviscera
Storage body fat consists of fat accumulation in adipose tissue, part of which protects internal organs in the chest and abdomen.

Physical fitness

fitnessphysical trainingphysical
The body fat percentage is a measure of fitness level, since it is the only body measurement which directly calculates a person's relative body composition without regard to height or weight.

Epidemiology

epidemiologistepidemiologicalepidemiologists
Epidemiologically, the percentage of body fat in an individual varies according to sex and age.

American Council on Exercise

ACEAmerican Council on Exercise (ACE)
The table below from the American Council on Exercise shows how average percentages differ according to the specified groups and categories:

Triglyceride

triglyceridestriacylglyceroltriacylglyceride
Irrespective of the location from which they are obtained, the fat cells in humans are composed almost entirely of pure triglycerides with an average density of about 0.9 kilograms per litre.

Infrared

IRnear-infraredinfra-red
A beam of infra-red light is transmitted into a biceps.

Biceps

biceps brachiibiceps brachii musclebicep
A beam of infra-red light is transmitted into a biceps.

Body water

total body waterWaterfluid
Some, referred to as multicompartment models, can include DXA measurement of bone, plus independent measures of body water (using the dilution principle with isotopically labeled water) and body volume (either by water displacement or air plethysmography).

Plethysmograph

plethysmographybody plethysmographyplethysmogram
Some, referred to as multicompartment models, can include DXA measurement of bone, plus independent measures of body water (using the dilution principle with isotopically labeled water) and body volume (either by water displacement or air plethysmography).

In vivo

in-vivoliving tissue(in vivo)
In-vivo neutron activation can quantify all the elements of the body and use mathematical relations among the measured elements in the different components of the body (fat, water, protein, etc.) to develop simultaneous equations to estimate total body composition, including body fat.

Anhydrous

waterlessdryfree from the presence of water
Fat-free mass (muscle) is a good conductor as it contains a large amount of water (approximately 73%) and electrolytes, while fat is anhydrous and a poor conductor of electric current.

Skin fold

plaitedskin foldsInterdigital Fold
Consequently, the body fat percentage calculated from skin folds or other anthropometric methods carries the cumulative error from the application of two separate statistical models.

Calipers

caliperdividersdivider caliper
A number of methods are available for determining body fat percentage, such as measurement with calipers or through the use of bioelectrical impedance analysis. The skinfold estimation methods are based on a skinfold test, also known as a pinch test, whereby a pinch of skin is precisely measured by calipers, also known as a Plicometer, at several standardized points on the body to determine the subcutaneous fat layer thickness.