Fitness Lessons Exercise Physiology Basics

Question 1

What is the primary energy system used during short bursts of high-intensity exercise lasting under 10 seconds?

Accepted Answer

Phosphocreatine (ATP-PC) system

Answer

Glycolytic system

Answer

Oxidative system

Answer

Lactic acid system

Question 2

Which term describes the increase in muscle size resulting from resistance training?

Accepted Answer

Hypertrophy

Answer

Atrophy

Answer

Hyperplasia

Answer

Catabolism

Question 3

What does VO2 max measure?

Accepted Answer

Maximum oxygen uptake during exercise

Answer

Maximum heart rate

Answer

Resting metabolic rate

Answer

Blood lactate concentration

Question 4

Which muscle fiber type is most resistant to fatigue?

Accepted Answer

Type I (slow-twitch)

Answer

Type IIa (fast-twitch oxidative)

Answer

Type IIx (fast-twitch glycolytic)

Answer

Type IIb (fast glycolytic)

Question 5

What happens to heart rate during aerobic exercise?

Accepted Answer

It increases to deliver more oxygenated blood to muscles

Answer

It decreases to conserve energy

Answer

It stays the same as at rest

Answer

It fluctuates randomly

Question 6

Which of the following best describes the 'lactate threshold'?

Accepted Answer

The exercise intensity at which lactate accumulates faster than it can be cleared

Answer

The point at which muscles stop producing energy

Answer

The maximum heart rate achievable

Answer

The level of oxygen saturation in the blood