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Ventilatory threshold

Ventilatory threshold
The ventilatory threshold is the intensity at which ventilation begins to rise in excess of VO2. It is best demonstrated by plotting VE/VO2 and VE/VCO2 on the same graph (as above). The ventilatory threshold is the point just before VE/VO2 begins to rise without a similar rise in VE/VCO2.
VE: volume of gas expired (L/min); VO2: volume of oxygen consumed (L/min); VCO2: volume of carbon dioxide produced (L/min).
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