Sports and Fitness Technology & Tools 3

Question 1

Which body composition method gives a regional breakdown of bone mineral, fat mass, and lean mass using low-dose X-rays?

Accepted Answer

DEXA (dual-energy X-ray absorptiometry)

Answer

DEXA scans separate bone, fat, and lean tissue by body region.

Question 2

A client gets a much higher body fat reading on a bioelectrical impedance scale after a hard workout without drinking water. What explains this?

Accepted Answer

Dehydration changes how electrical current moves through the body

Answer

BIA depends on body water, so dehydration raises impedance and inflates the body fat estimate.

Question 3

Skinfold calipers estimate body fat by measuring:

Accepted Answer

The thickness of subcutaneous fat at specific sites

Answer

Calipers measure folds of skin and the fat just under it, then put the readings into prediction equations.

Question 4

Which equipment directly measures VO2max during a graded exercise test?

Accepted Answer

A metabolic cart that analyzes expired gases

Answer

A metabolic cart measures the oxygen and carbon dioxide in exhaled air to calculate oxygen uptake directly.

Question 5

A strength coach uses force plates during countermovement jump testing mainly to measure:

Accepted Answer

Ground reaction forces and rate of force development

Answer

Force plates record how much force is applied to the ground and how fast it is produced.

Sports and Fitness Practice Test