Question

Which of the following can be used to identify the anaerobic or ventilatory threshold?

1. Increase in blood lactate
2. Increase in blood pH
3. Change in the rate of CO2 in relation to O2
4. A plateau in the O2

Answer 1

The anaerobic or ventilatory threshold can be identified by an increase in blood lactate and an increase in carbon dioxide (CO2) levels.

Step-by-step explanation:

The anaerobic or ventilatory threshold can be identified by an increase in blood lactate, as lactate is a by-product of anaerobic glycolysis. This increase indicates that the body is relying more on anaerobic metabolism as exercise intensity increases. Therefore, an increase in blood lactate is a clear marker of the anaerobic threshold.

Additionally, an increase in carbon dioxide (CO2) levels can also indicate the anaerobic threshold. During intense exercise, CO2 production increases as a result of anaerobic metabolism. Therefore, a change in the rate of CO2 in relation to O2 can serve as an indicator of the anaerobic threshold.