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%?

  • 25 lbs
  • 30 lbs (correct)
  • 22 lbs
  • 28 lbs

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

  • Nerves
  • Heart
  • Muscles
  • Connective tissue (correct)

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

  • 19-22%
  • 24-30% (correct)
  • 23-28%
  • 16-18%

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

<p>VL Lean (A)</p> 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?

<p>150 lbs (B)</p> Signup and view all the answers

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

<p>30-39 years (C)</p> Signup and view all the answers

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

<p>Essential fat stores (A)</p> Signup and view all the answers

What is the density of fat in adipose tissue?

<p>0.901 g·cm$^{-3}$ (D)</p> Signup and view all the answers

What is the classic two-component model based on?

<p>Fat component and fat-free body (FFB) component (D)</p> Signup and view all the answers

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

<p>Hydrostatic weighing (B)</p> Signup and view all the answers

What percentage of adipose tissue is water?

<p>15% (A)</p> Signup and view all the answers

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

<p>Activity level (C)</p> Signup and view all the answers

Which method is NOT used for body composition assessment?

<p>Blood pressure measurement (C)</p> Signup and view all the answers

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

<p>1.100 g·cm$^{-3}$ (B)</p> Signup and view all the answers

What is residual lung volume (RV)?

<p>The volume of air remaining in the lungs after a maximal expiration and is least affected by hydrostatic pressure (B)</p> Signup and view all the answers

What are the sources of error in hydrostatic weighing?

<p>Pretesting guidelines, equipment calibration, client factors, precision and measurement of RV and underwater weight (B)</p> Signup and view all the answers

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

<p>Determining body density, body volume, relative fat percentage, fat mass, fat-free mass, and target body weight using specific equations (D)</p> Signup and view all the answers

What are the disadvantages of underwater weighing?

<p>Time-consuming nature, expensive equipment, space and plumbing requirements, dependence on client skill and cooperation (A)</p> Signup and view all the answers

How is underwater weight measured in hydrostatic weighing?

<p>Using a chair attached to an autopsy or a spring scale, or using a platform attached to load cells (A)</p> Signup and view all the answers

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

<p>Between 34-36°C (C)</p> Signup and view all the answers

What does the modification of hydrostatic weighing procedures include?

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

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

<p>Bod Pod (A)</p> Signup and view all the answers

What factors can affect accurate results in Bod Pod testing?

<p>Body hair, clothing, and breathing patterns (D)</p> Signup and view all the answers

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

<p>Bone mass, fat, and lean soft tissue (A)</p> Signup and view all the answers

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

<p>Low-energy x-ray beams (D)</p> Signup and view all the answers

What is crucial for precise results in a DEXA scan?

<p>Calibration of the scanner (D)</p> Signup and view all the answers

What can affect the accuracy of DEXA technologies?

<p>Imaging geometry, X-ray detectors, and software versions (D)</p> Signup and view all the answers

What are the advantages of Bod Pod?

<p>Quick administration and minimal client compliance (D)</p> Signup and view all the answers

What are the advantages of DEXA?

<p>Safety, rapid administration, minimal client cooperation, and accounting for individual variability in bone mineral content (C)</p> Signup and view all the answers

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

<p>Expense (D)</p> Signup and view all the answers

Flashcards

Fat Mass Calculation

Fat Mass is 30 lbs.

Non-Essential Tissue

Connective tissue is NOT essential fat.

Over Fat Percentage (Female, 30)

24-30% body fat is classified as 'Over fat.'

10% Body Fat (Male)

VL Lean.

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Fat-Free Mass Calculation

Fat-Free Mass is 150 lbs.

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Highest Recommended % Body Fat (Female, 'Ave')

30-39 years old.

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Lean Body Mass Content

Essential fat stores.

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Density of Fat

0.901 g·cm$^{-3}$

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Two-Component Model

Fat component and fat-free body (FFB) component.

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Water Displacement Method

Hydrostatic weighing.

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Water in Adipose Tissue

15%

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Determining Storage Fat

Activity level

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Method NOT for Body Composition

Blood pressure measurement

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Density of Fat-Free Body

1.100 g·cm$^{-3}$

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Residual Lung Volume (RV)

The volume of air remaining in the lungs after a maximal expiration and is least affected by hydrostatic pressure.

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Hydrostatic Weighing Error Sources

Pretesting guidelines, equipment calibration, client factors, precision and measurement of RV and underwater weight.

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Hydrostatic Weighing Calculations

Determining body density, body volume, relative fat percentage, fat mass, fat-free mass, and target body weight using specific equations

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Disadvantages of Underwater Weighing

Time-consuming nature, expensive equipment, space and plumbing requirements, dependence on client skill and cooperation

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Underwater Weight Measurement

Using a chair attached to an autopsy or a spring scale, or using a platform attached to load cells.

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Hydrostatic Weighing Water Temperature

Between 34-36°C

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Hydrostatic Weighing Modifications

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

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Air Displacement Method

Bod Pod.

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Bod Pod Accuracy Factors

Body hair, clothing, and breathing patterns.

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DEXA Assessment

Bone mass, fat, and lean soft tissue.

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DEXA Measurement Tool

Low-energy x-ray beams.

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DEXA Results

Calibration of the scanner.

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DEXA Accuracy Affectors

Imaging geometry, X-ray detectors, and software versions.

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Bod Pod Advantages

Quick administration and minimal client compliance.

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DEXA Advantages

Safety, rapid administration, minimal client cooperation, and accounting for individual variability in bone mineral content.

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Bod Pod & DEXA Disadvantage

Expense.

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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.

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EXCI252Ch8AssessingBodyCompostionF2023Part1.pptx

Description

Test your knowledge of body composition analysis methods with this quiz. Learn about the Bod Pod and Dual-Energy X-Ray Absorptiometry (DEXA) techniques, their advantages, limitations, and factors affecting accuracy.

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