As the intensity level of the activity being performed increases, breathing becomes faster; more steadily first and then more rapid as the intensity increases. When breathing surpasses normal ventilation rate, one has reached ventilatory threshold.
What is the likely cause mechanism of the ventilatory threshold?
So what does cause the ventilatory threshold? According to McMurray, the evidence suggests that it is the activation of fast-twitch muscle fibers.
How is ventilatory threshold determined?
The ventilatory threshold was determined for each of the six exercise tests by three independent, blinded reviewers by means of graphic plots of three commonly used methods of determination: (1) changes in the ventilatory equivalents for VO2 and VCO2, (2) changes in end-tidal oxygen and carbon dioxide pressures, and (3 ...
