W9-L1: Estimating Body Composition

Question 1

SIMPLE SCREENING

Answer 1

Question 2

What are the 3 SOMATOTYPES?

Answer 2

Question 3

What are the 5 methods of
Estimating Body Composition?

Answer 3

1. Hydrodensitometry e.g. underwater weighing
2. Air Displacement Plethysmography e.g. bod pod
3. DXA
4. Bio electrical impedance
5. Skinfolds

Question 4

What are the Considerations of using Hydrodensitometry?
(e.g. underwater weighing )

Answer 4

Equipment, complete submersion and willing to expel all air from lungs

Question 5

What are the Considerations of using
Air Displacement Plethysmography? (e.g. bod pod)

Answer 5

Equipment, subject must stay still and quiet,
size restrictions in bod pod

Question 6

What are the Considerations of using DXA?

Answer 6

Equipment, exposure to low radiation

Question 7

What are the Considerations of using
Bio electrical impedance?

Answer 7

Many external factors can effect results e.g. hydration status, training, body position, equations are manufacturer IP

Question 8

What are the Considerations of using
Skinfolds?

Answer 8

Technician expertise, equations

Question 9

What is BMI?

Answer 9

BODY MASS INDEX

Question 10

What are the advantages of BMI?

Answer 10

Advantages:

• Cheap, Quick, Simple
• Non invasive
• Assess risk of obesity related diseases
• Useful for population assessment

Question 11

What are the disadvantages of BMI?

Answer 11

Disadvantages:

• Classification based on Caucasian male population
• Does not differentiate b/w body weight (muscle) & body fat
• Doesn’t consider body fat distribution