Body Composition Assessments Flashcards
Calculate BMI
Weight (kg) / height (m)
Underweight BMI
< 18.5
Healthy BMI
18.5 - 25.0
Overweight BMI
25.0 - 30.0
Obese BMI
> 30.0
Healthy wight
A body weight that does not increase risk foo developing weight related health problems on diseases
BMI limitations
- Overweight classification assumes relationship between BMI & fat% is independent of age, gender, ethnicity, & race
- Fails to consider body’s proportional composition of fat distribution
- Factors other than excess fat affect body weight
- Possibility of misclassifying someone as overweight
Body comp
Relate proportion of body mass made up of different components
Essential fat body def
Required for normal physiological function & health
Non fat tissues
Water, cell solids, minerals
All fat tissue
Essential fats & storage
Essential body fat %
Men- 3%
Women -12%
Stored body fat def
Body fat above essential levels
Fat free mass (fam)
Mass of all nonfat tissues in the body
Lean body mass (LBM)
The mass of all non -fat tissues plus the mass of essential fat
Percent body fat (PBF)
% Body mass that is fat tissue
Fat mass (FM)
The mass of fat tissue
Determination of body comp
Laboratory:
Hydrostatic weighing, bodied, DEXA
Field:
Skinfolds, body girths, BIA
Classification and uses of body comp measures
- Estimate healthy body weight
-estimate competitive body weight for athletes
-monitor growth of children and adolescents
-assess changes in body composition
Density
Mass/ volume
Hydrostatic weighing
Estimates body comp
Requires body submersion
Residual lung volume measurement increases accuracy
DEXA
3 comp model
Uses 2 xray beam frequencies
Skinfold method
Invasive method
SKF is good measure of subcutaneous fat
