Questions: Question 16 What is the primary purpose of hydrostatic weighing? O To calculate BMI O To measure muscle mass O To assess body density O To calculate body density

The answer is the third one: To assess body density.

Explanation for each option:

1. To calculate BMI: Incorrect. BMI (Body Mass Index) is calculated using a person's height and weight, not through hydrostatic weighing.

2. To measure muscle mass: Incorrect. While hydrostatic weighing can provide information that helps estimate body composition, including muscle mass, its primary purpose is not to directly measure muscle mass.

3. To assess body density: Correct. Hydrostatic weighing is primarily used to assess body density. It involves submerging a person in water to measure their body volume and, subsequently, their body density. This information is then used to estimate body composition, such as the percentage of body fat.

4. To calculate body density: Incorrect. While hydrostatic weighing is used to assess body density, the phrasing "to calculate body density" is not as accurate as "to assess body density," which encompasses the broader purpose of the method.

In summary, the primary purpose of hydrostatic weighing is to assess body density.