MES Exercise Physiology & Fitness Testing 1 — Questions and Answers
Question 1: Which variable is measured by a VO₂max test to determine cardiorespiratory fitness?
- Maximum blood lactate concentration
- Maximum oxygen consumption during progressive exercise (Correct answer)
- Peak heart rate at exhaustion
- Anaerobic threshold in watts
Correct answer: Maximum oxygen consumption during progressive exercise
VO₂max is the maximum rate of oxygen uptake during incremental exercise, representing the ceiling of the aerobic energy system.
Question 2: The Fick equation defines VO₂ as the product of cardiac output and which other variable?
- Heart rate
- Stroke volume
- Arteriovenous oxygen difference (a-vO₂ diff) (Correct answer)
- Blood lactate
Correct answer: Arteriovenous oxygen difference (a-vO₂ diff)
The Fick equation states VO₂ = cardiac output × a-vO₂ difference, reflecting both oxygen delivery and muscle oxygen extraction.
Question 3: Which submaximal field test estimates VO₂max using the relationship between heart rate and workload?
- YMCA Cycle Ergometer Test (Correct answer)
- Wingate Anaerobic Test
- Illinois Agility Test
- Margaria-Kalamen Test
Correct answer: YMCA Cycle Ergometer Test
The YMCA Cycle Ergometer Test uses submaximal heart rate responses at multiple workloads to extrapolate estimated VO₂max.
Question 4: At what blood lactate concentration is the lactate threshold (LT1) generally identified?
- 1 mmol/L
- 2 mmol/L (Correct answer)
- 4 mmol/L
- 8 mmol/L
Correct answer: 2 mmol/L
LT1 is conventionally identified at approximately 2 mmol/L of blood lactate, marking the onset of sustained lactate accumulation.
Question 5: Which metabolic adaptation primarily accounts for the reduction in resting heart rate seen after months of aerobic training?
- Increased red blood cell count
- Increased stroke volume due to cardiac hypertrophy (Correct answer)
- Decreased muscle oxidative capacity
- Reduced plasma volume
Correct answer: Increased stroke volume due to cardiac hypertrophy
Eccentric cardiac hypertrophy increases stroke volume, allowing the heart to maintain cardiac output at a lower rate at rest.
Question 6: Which term describes the oxygen deficit repaid after exercise to restore the body to its pre-exercise state?
- Steady-state VO₂
- Excess post-exercise oxygen consumption (EPOC) (Correct answer)
- Anaerobic capacity
- Respiratory exchange ratio
Correct answer: Excess post-exercise oxygen consumption (EPOC)
EPOC (excess post-exercise oxygen consumption) represents the elevated oxygen uptake after exercise used to restore phosphocreatine, clear lactate, and normalize temperature.
MES Exercise Physiology & Fitness Testing 1
Which variable is measured by a VO₂max test to determine cardiorespiratory fitness?