FTCE Physical Education K-12 Practice Test

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Which method is used for body composition determination?

Vertical jumping
Hydrostatic weighing
Stick test of coordination
Modified sideward leap

The correct answer is: Hydrostatic weighing

Hydrostatic weighing is a method used for body composition determination that involves measuring a person's weight in water versus their weight on land. This technique relies on Archimedes' principle, which states that the buoyant force acting on an object submerged in a fluid is equal to the weight of the fluid displaced by that object. By comparing a person's underwater weight to their land weight, it's possible to calculate body density, which can then be used to estimate body fat percentage. This method is highly regarded for its accuracy in assessing body composition because it directly measures fat mass and lean mass, providing a more detailed picture of an individual's physical health than simple weight measurements alone. Other methods, while useful for various assessments, do not specifically focus on determining body composition in the same precise manner.