Question

1.) Predicting residual volume, rather than measuring it, likely increases the error in determining body density using hydrostatic weighing.

True or False

2.) An individual's loss of weight in water is directly proportional to the volume and weight of the water displaced by the body.

True or False

3.) Individuals with a higher body density will have more body fat.

True or False

4.) Hydrostatic weighing is considered the "gold standard" method of determining body composition because, when performed correctly, there is little to no error in the measurement of body fat.

True or False

Answer 1

1. False

The residual volume is the amount of air which is left within the lungs at end of exhalation and since it is not possible to remove the air with force, its concentration tends to increase in lungs. Basically, hydrostatic weighing is done between two person who have everything same but different residual volume. In this one has greater and one has lesser. With help of hydrostatic weighing which helps in determining mass per unit within a person and helps in determining accurately body composition. In this the volume is not measured but predicted and the person who has higher residual volume has more percentage of fat in their body.

2. True

This holds true according to the Archimedes principle which states that the loss of weight of an individual under water is proportional to displacement of water volume and weight from body. This means that when there is movement of water from the body to the underwater environment, it helps in losing water weight and aids in weight loss underwater.

3. False

When it states that higher density, it is majorly in terms of muscles. A person who has high content of muscle has higher body density as the muscle is denser than fat. Hence, one has high body density, they have high amount of muscle and low amount of fat which makes one more lean and less fat.

4. True

The hydrostatic weighing is considered to be one of the most accurate ways to determine the body composition and has very little errors. It is considered as gold standard as it mostly helps in giving very accurate result. It helps in measuring body fat and the muscle after underwater submergence and since muscle is denser than fat, one who has high content of fat will weight less under water and one with high muscle content will weigh higher underwater.