NSCA-CPT Exercise Physiology 2

Question 1

Which energy system is the PRIMARY source for a 400-meter sprint?

Accepted Answer

Glycolytic system

Answer

The 400-meter sprint (approximately 45–60 seconds) relies primarily on the glycolytic (anaerobic lactic) system.

Question 2

During prolonged aerobic exercise, which fuel source becomes increasingly important as glycogen stores deplete?

Accepted Answer

Free fatty acids

Answer

As muscle glycogen decreases during prolonged exercise, free fatty acid oxidation progressively contributes more to energy production.

Question 3

What is the approximate oxygen uptake at rest (1 MET) for the average adult?

Accepted Answer

3.5 ml/kg/min

Answer

One MET equals approximately 3.5 ml/kg/min of oxygen consumption, the standard resting metabolic rate.

Question 4

Which cardiac parameter is defined as the volume of blood ejected per heartbeat?

Accepted Answer

Stroke volume

Answer

Stroke volume is the amount of blood pumped by the left ventricle with each contraction.

Question 5

The Fick equation states that VO2 = cardiac output × which variable?

Accepted Answer

Arteriovenous oxygen difference

Answer

The Fick principle expresses VO2 as the product of cardiac output and the a-vO2 difference (oxygen extracted by tissues).

NSCA-CPT Exam Practice Test