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I’d say that the biggest con for this test is that you have to get wet. Also, there can be a margin of error if all of the air isn’t released from the lungs when you submerge. The benefit of hydrostatic testing is that it’s fairly reasonable, usually costing between $45-$60.This is the gold standard of body composition determination. Limitation of hydrostatic weighing: requires subject cooperation to exhale completely and then submerge completely underwater up to 10 times—impossible for elderly, ill, or hospitalized patients.Hydrostatic weighing: Because it’s based on the Archimedes principle of fluid displacement, this method is often called underwater weighing. The American College of Sports Medicine (ACSM) has called it the gold standard because of its high accuracy. People are submerged under water and weighed.
What is a limitation of hydrostatic weighing for determining BF?
This is the gold standard of body composition determination. Limitation of hydrostatic weighing: requires subject cooperation to exhale completely and then submerge completely underwater up to 10 times—impossible for elderly, ill, or hospitalized patients.
Why is hydrostatic weighing the most accurate?
Hydrostatic weighing: Because it’s based on the Archimedes principle of fluid displacement, this method is often called underwater weighing. The American College of Sports Medicine (ACSM) has called it the gold standard because of its high accuracy. People are submerged under water and weighed.
Body Composition Assessment Techniques (UPDATED VERSION IN DESCRIPTION)
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What is hydrostatic weighing and how does it determine body composition?
Hydrostatic weighing is one of the most accurate ways to measure body fat. During the test, you’ll be submerged in water while you sit on a scale. An administrator will calculate your body fat percentage by comparing your land weight with your underwater weight.
What is the most reliable test for measuring body composition?
Body fat testing is a great way to have an accurate metric for your body composition. There are many ways of getting your body fat tested, but most experts will agree that the DEXA (Dual-Energy X-ray Absorptiometry) scan is the most accurate testing technology available.
What is the disadvantages of hydrostatic weighing?
While hydrostatic weighing is the gold standard for body composition measurements, there are a few disadvantages. First and foremost, it is expensive and requires a lot of space. Additionally, subjects must completely submerge themselves underwater and expel all of the air in their lungs.
What are the pros and cons of underwater weighing?
advantages: Underwater weighing is the most widely used test of body density and in the past was the criterion measure for other indirect measures. disadvantages: The equipment required to do underwater weighing is expensive.
What is hydrostatic weighing used for?
Hydrostatic underwater weighing has long been considered the gold standard for body composition assessment. However, new and more sophisticated methods may make underwater weighing obsolete in the near future.
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What is hydrostatic weighing quizlet?
Hydrostatic weighing estimates body density by calculating the difference between body mass measured in air and body mass measured in water.
Which of the following is considered the most accurate method for estimating a person’s body fat composition?
Hydrostatic weighing is an incredibly accurate technique for measuring body composition. The technique uses tried and true variables that feature a low percentage of error. For that reason, many experts refer to hydrostatic weighing as the gold standard for measuring body composition.
Which of the following is a disadvantage of DXA?
A major disadvantage of DXA is that currently there is a lack of standardization in bone and soft tissue measurements. There are large discrepancies in measurements obtained on instruments from the three major manufacturers of DXA machines.
How much does hydrostatic weighing cost?
As with the DXA scan, hydrostatic weighing requires a trained professional, and the machine is bulky and expensive. A complete hydrostatic system costs about $15,000.
Body Composition Assessment for Health
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What is the most accurate method of determining the percentage of one’s body fat?
Hydrostatic (or underwater) weighing
According to the American College of Sports Medicine (ACSM), this is the gold standard for calculating body fat because of its high accuracy.
What are some factors that can make skinfold testing inaccurate?
Systematic errors cannot be reduced by averaging because they bias the result away from the actual value in the same direction every time. For example, if the PT made a mark on the skin to improve precision, but the mark was actually in the wrong spot, then every measurement would be inaccurate in the same way.
What are four factors that affect body composition?
Gender, age, race, nutrition, physical activity, and hormonal status are the main determinants of body composition.
Is there one way of measuring body composition that is more efficient than the others?
DXA/DEXA Scan. A DXA or DEXA scan is the most accurate and advanced form of body composition analysis available. It uses x-ray technology to scan your body and provides a detailed assessment of how much muscle mass and fat mass you have (down to the pound), and exactly where fat and muscle is stored on your body.
What are the advantages and disadvantages of the skinfold test?
| Advantages | Disadvantages |
|---|---|
| Quick to execute | High inter-tester variability (i.e. reliability can be poor when the tester does not remain the same) |
| Minimal equipment and subject participation required | Most skinfold calipers have an upper limit of 45–60 mm, limiting their use to moderately overweight subjects |
How is hydrostatic testing done?
Hydrostatic tests are conducted by filling an object with water and pressurizing it to test for strength and leaks. The ability to detect leaks in an object is one of the most important reasons why this type of testing should be performed regularly.
What is a con of underwater weighing?
For the elderly with issues such as osteoporosis, hydrostatic weighing may inaccurately return readings due to the difference in bone composition. Being repeatedly submerged in water is seen as another disadvantage of hydrostatic weighing.
How is plethysmography advantageous over underwater weighing?
Compared to underwater weighing, the BOD POD does not require getting wet and is suitable for special populations such as infants, children, obese, elderly and disabled persons. Residual lung volume measurements are not needed like underwater weighing. Hydration status can adversely affect calculation results.
How accurate is the body fat machine?
“The body fat scales you can buy online are safe and convenient, but they aren’t accurate,” says Dr. Woolcott, who adds that studies on these devices aren’t reliable because they’re tested on a small number of people. “The scales underestimate or overestimate body fat percentage by quite a lot.
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Why must the underwater body weight be corrected for air in the lungs residual volume )?
An allowance must be made for residual lung volume (the air that remains in the lungs after a maximal exhalation) as this air increases the participant’s buoyancy.
Which method of obtaining a diet history is likely to provide the most accurate nutrition information?
Magnetic resonance imaging is considered to be the preferred reference method due to the accuracy combined with ease of completion and cost effectiveness.
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