Exercise Physiology: Theory and Application to Fitness and Performance 9th Edition by Scott Powers, Edward Howley

Exercise 9

Graph the ventilatory response to incremental exercise. Label the ventilatory threshold. What factor(s) might explain the ventilatory threshold?

Step 1 of 2

The ventilator response increases as a linear function of oxygen uptake up to 50% to 75% of O₂ max. From then onwards, ventilation begins to rise exponentially. This change is seen in both a trained and untrained male athletes. The point at which V_E starts to rise exponentially is called ventilator threshold, which is shown in the graph given below:

Figure 1: Changes in ventilation during incremental exercise