Question

iii. How are ventilatory, lactate, and anaerobic thresholds different from one another? iv. How are ventilatory, lactate, and anaerobic thresholds related?

Answer 1

iii) Ventilatory threshold is the point at which the rate of breathing increases rapidly which may be due to increase in the intensity of the exercise or other extreme physical activities. The uptake of oxygen is less compared to exhalation of carbon dioxide which is much higher due to increased cellular respiration.

Lactate threshold is the point at which there is sudden increase in the concentration of lactate in the blood due to cellular respiration which occurs in the absence of oxygen in order to meet the energy demands at high intensity levels of physical activities.

Anaerobic threshold is the point at which almost all the energy requirements of the body is met by means of anaerobic cellular respiration.

iv) Ventilatory and lactate threshold are similar because increase in lactate concentration is directly related to increase in ventilation where both results from increased cellular respiration. Also lactate threshold is due to anaerobic respiration where there is demand for oxygen in the body.

All the three are interrelated to each other as increased physical activity causes increased cellular respiration which results in low oxygen levels, anaerobic respiration and high lactate levels