Final Exam Slideshow 12.1

Question 1

Relative body fat (%BF)

Answer 1

Classifies level of body fatness

Question 2

%BF spectrum for 20- to 29-year-olds

Average for:

Men

Women

Answer 2

Men: 15.0%

Women: 20.0%

Question 3

BC Methods

Reference Methods: 3 of them

Answer 3

1) hydrostatic weighing
2) air displacement plethysmography
3) dual-energy X-ray absorptiometry

Question 4

BC Methods

Field Methods

Answer 4

Field Methods

1) skinfold
2) ultrasound
3) bioimpedance
4) anthropometry

Question 5

Body Composition: Two-Component Model

Assumptions

Answer 5

1. Density of fat = 0.901 g∙cc –3
2. Density of FFB = 1.10 g∙cc –3
3. Densities of fat and FFB components are same for EVERYONE
   FFB  Water (73.8%); Protein (19.4%); Mineral (6.8%)
4. Densities of the various tissues composing the FFB are constant within
   an individual
5. Individual being measured differs from the reference body only in the
   amount of body fat

Question 6

Whole body =

Answer 6

fat + fat-free body (FFB)

Question 7

Body Composition: Two-Component Model

Factors:

Answer 7

FFB density known to vary
Age
Sex
Ethnicity
Physical Activity
%BF
Variance due to % water and % mineral within FFB

Question 8

Body Composition: Multi-Component Model

Answer 8

Eliminate much of guesswork in 2C model assumptions

Measure %water and %mineral

Useful for developing population-specific formulas

Question 9

Hydrostatic Weighing (HW)

Answer 9

Valid and reliable densitometric method

Estimates body volume (BV)

Requires total body submersion

Computation of Db

Db = total body mass / BV

Residual lung volume (RV) measurement
increases accuracy

Pretest guideline adherence a must