The transition in exercise intensity from heavy intensity (Zone 2) to severe intensity (Zone 3) is identified by the:

Question

Quizplus · Accepted Answer

The transition from heavy intensity to severe intensity is best identified by the ventilatory threshold, which is the point at which breathing becomes more labored and the body starts to rely more heavily on anaerobic energy production. The lactate threshold and maximal oxygen consumption can also provide some insight into exercise intensity, but they are not as specific to this transition.

The Transition in Exercise Intensity from Heavy Intensity (Zone 2)