BHK Exercise Physiology

Question 1

What is the primary energy system used during a 100-meter sprint?

Accepted Answer

ATP-PCr system

Answer

The ATP-PCr (phosphocreatine) system provides immediate energy for maximal efforts lasting under 10 seconds.

Question 2

Which term describes the maximum amount of oxygen the body can utilize during intense exercise?

Accepted Answer

VO2 max

Answer

VO2 max is the maximal oxygen uptake and is considered the gold standard measure of cardiorespiratory fitness.

Question 3

What happens to stroke volume during progressive aerobic exercise in a trained individual?

Accepted Answer

It increases then plateaus near maximal intensity

Answer

Stroke volume increases with exercise intensity but plateaus at approximately 40–60% of VO2 max in trained individuals.

Question 4

Which muscle fiber type is most resistant to fatigue and relies predominantly on oxidative metabolism?

Accepted Answer

Type I

Answer

Type I (slow-twitch) fibers have high mitochondrial density and capillary supply, making them highly fatigue-resistant.

Question 5

The lactate threshold is best described as the exercise intensity at which:

Accepted Answer

Blood lactate begins to accumulate faster than it is cleared

Answer

The lactate threshold marks the point where lactate production exceeds clearance, causing blood lactate to rise exponentially.

BHK - Bachelor of Kinesiology Practice Test