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Ventilatory threshold — Medical Practice MCQ

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ModerateExercise PhysiologyVentilatory threshold

A rower’s ventilation rises disproportionately at higher intensity during incremental testing, and speaking becomes difficult before exhaustion. What is the physiological explanation?

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Correct answer: D — Ventilatory threshold has been reached

Ventilatory threshold occurs when ventilation increases disproportionately relative to oxygen uptake. It is linked to buffering of hydrogen ions and rising carbon dioxide output as intensity increases. It is useful for training prescription.

Reference: McArdle Exercise Physiology