ventilatory threshold is point of max exercise capacity

• related: cardiopulmonary exercise test CPET
• tags: #permanent #pulmonology

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• the amount of air being moved ($V_e$) now exceeds the amount of oxygen and CO2 being exchanged ($V_{O_2}$ and $V_{CO_2}$), and this gets worse as work increases. This causes a change in slope of $V_e/V_{O_2}$ and $V_e/V_{CO_2}$

• this threshold point is typically when $V_{O_2}$ is at 40-60% peak $V_{O_2}$

¹

• elevated ventilatory threshold correlates with better athletic training (takes longer to reach anaerobic threshold)
• normal ventilatory threshold could mean poor effort but could also mean diseases
• decreased ventilatory threshold means diseases

²

Links to this note

• cardiopulmonary exercise test CPET

  • ventilatory threshold is point of max exercise capacity

• anaerobic threshold is point of anaerobic metabolism in CPET

  • this is different from ventilatory threshold (ventilatory threshold is point of max exercise capacity).

Footnotes

1. Cardiopulmonary exercise testing, A contemporary and versatile clinical tool ↩

2. A Practical Approach? ↩