Body Composition Analysis Methods Quiz

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Questions and Answers

What is the estimated Fat Mass (FM) if the Total Body Weight is 150 lbs and the % Body Fat is 20%?

30 lbs

Which of the following tissues is NOT included in the Essential Fat category?

Connective tissue

What percentage of Body Fat is recommended for a female aged 30 with an 'Over fat' classification?

24-30%

Which category does a male with 10% body fat fall into?

VL Lean Signup and view all the answers

What is the estimated Fat-Free Mass (FFM) if the Total Body Weight is 180 lbs and the Fat Mass (FM) is 30 lbs?

150 lbs Signup and view all the answers

Which age group has the highest recommended % Body Fat for females in the 'Ave' category?

30-39 years Signup and view all the answers

What does Lean Body Mass (LBM) contain a small percentage of?

Essential fat stores Signup and view all the answers

What is the density of fat in adipose tissue?

0.901 g·cm$^{-3}$ Signup and view all the answers

What is the classic two-component model based on?

Fat component and fat-free body (FFB) component Signup and view all the answers

Which method is based on Archimedes’ principle of water displacement?

Hydrostatic weighing Signup and view all the answers

What percentage of adipose tissue is water?

15% Signup and view all the answers

What is the most important factor determining the amount of storage fat?

Activity level Signup and view all the answers

Which method is NOT used for body composition assessment?

Blood pressure measurement Signup and view all the answers

What is the density of fat-free body (FFB)?

1.100 g·cm$^{-3}$ Signup and view all the answers

What is residual lung volume (RV)?

The volume of air remaining in the lungs after a maximal expiration and is least affected by hydrostatic pressure Signup and view all the answers

What are the sources of error in hydrostatic weighing?

Pretesting guidelines, equipment calibration, client factors, precision and measurement of RV and underwater weight Signup and view all the answers

What does the calculation of body fat percentage from hydrostatic weighing involve?

Determining body density, body volume, relative fat percentage, fat mass, fat-free mass, and target body weight using specific equations Signup and view all the answers

What are the disadvantages of underwater weighing?

Time-consuming nature, expensive equipment, space and plumbing requirements, dependence on client skill and cooperation Signup and view all the answers

How is underwater weight measured in hydrostatic weighing?

Using a chair attached to an autopsy or a spring scale, or using a platform attached to load cells Signup and view all the answers

At what temperature does water density typically range for hydrostatic weighing?

Between 34-36°C Signup and view all the answers

What does the modification of hydrostatic weighing procedures include?

Measuring at functional residual capacity (FRC), total lung capacity (TLC), and TLC with the head above water level Signup and view all the answers

Which method uses air displacement to measure body volume and density?

Bod Pod Signup and view all the answers

What factors can affect accurate results in Bod Pod testing?

Body hair, clothing, and breathing patterns Signup and view all the answers

What does DEXA assess at whole-body and regional levels?

Bone mass, fat, and lean soft tissue Signup and view all the answers

What does DEXA use to quantify bone mineral content, total fat mass, and fat-free mass?

Low-energy x-ray beams Signup and view all the answers

What is crucial for precise results in a DEXA scan?

Calibration of the scanner Signup and view all the answers

What can affect the accuracy of DEXA technologies?

Imaging geometry, X-ray detectors, and software versions Signup and view all the answers

What are the advantages of Bod Pod?

Quick administration and minimal client compliance Signup and view all the answers

What are the advantages of DEXA?

Safety, rapid administration, minimal client cooperation, and accounting for individual variability in bone mineral content Signup and view all the answers

What is a common disadvantage of both Bod Pod and DEXA?

Expense Signup and view all the answers

Study Notes

Body Composition Analysis Methods

Body composition analysis calculates body fat percentage, fat-free mass, and target body weight.
Bod Pod, using air displacement, measures body volume and density based on Boyle's Law.
Factors affecting accurate Bod Pod results include body hair, clothing, and breathing patterns.
Errors in Bod Pod testing can occur due to deviations in normal breathing and calibration.
Advantages of Bod Pod include quick administration and minimal client compliance, but it is expensive.
Dual-Energy X-Ray Absorptiometry (DEXA) assesses bone mass, fat, and lean soft tissue at whole-body and regional levels.
DEXA uses low-energy x-ray beams to quantify bone mineral content, total fat mass, and fat-free mass.
Advantages of DEXA include safety, rapid administration, minimal client cooperation, and accounting for individual variability in bone mineral content.
Fasting prior to a DEXA scan increases accuracy, and calibration of the scanner is crucial for precise results.
Variability among DEXA technologies, including imaging geometry, X-ray detectors, and software versions, affects accuracy.
DEXA is expensive and generally accessible only in clinical or research settings.
Both Bod Pod and DEXA have advantages and disadvantages in accurately assessing body composition.