Exercise Physiology & Fitness Testing Flashcards

Which variable is measured by a VO₂max test to determine cardiorespiratory fitness?

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.

The Fick equation defines VO₂ as the product of cardiac output and which other variable?

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.

Which submaximal field test estimates VO₂max using the relationship between heart rate and workload?

Answer: YMCA Cycle Ergometer Test

The YMCA Cycle Ergometer Test uses submaximal heart rate responses at multiple workloads to extrapolate estimated VO₂max.

At what blood lactate concentration is the lactate threshold (LT1) generally identified?

Answer: 2 mmol/L

LT1 is conventionally identified at approximately 2 mmol/L of blood lactate, marking the onset of sustained lactate accumulation.

Which metabolic adaptation primarily accounts for the reduction in resting heart rate seen after months of aerobic training?

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.

Which term describes the oxygen deficit repaid after exercise to restore the body to its pre-exercise state?

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.