ACSM Exercise Science 5

Question 1

Which assessment is used to estimate cardiorespiratory fitness without maximal exertion and is based on heart rate response?

Accepted Answer

YMCA Submaximal Cycle Ergometer Test

Answer

The YMCA Submaximal Cycle Ergometer Test estimates VO2max by extrapolating the linear heart rate-workload relationship to predicted maximal heart rate.

Question 2

What is the primary fuel source during low-intensity, prolonged exercise (e.g., 30–50% VO2max)?

Accepted Answer

Free fatty acids

Answer

At low intensities, the aerobic system relies predominantly on free fatty acid oxidation, sparing glycogen for higher-intensity demands.

Question 3

What is the Frank-Starling mechanism and its significance in exercise physiology?

Accepted Answer

Increased venous return stretches the ventricle, increasing stroke volume

Answer

The Frank-Starling mechanism describes how increased venous return during exercise stretches ventricular walls, enhancing contractility and stroke volume.

Question 4

Which type of stretching is most recommended for improving flexibility and is generally considered the safest for most populations?

Accepted Answer

Static stretching

Answer

Static stretching, involving holding a position for 15–60 seconds, is widely recommended for improving flexibility with a low injury risk profile.

Question 5

During high-intensity interval training (HIIT), which metabolic byproduct is primarily responsible for the burning sensation in muscles?

Accepted Answer

Lactic acid accumulation and hydrogen ion production

Answer

The burning sensation during intense exercise is caused by hydrogen ion accumulation (from lactate production), which decreases muscle pH and impairs contraction.

ACSM Practice Test

ACSM Practice Test

ACSM Exercise Science 5