5090/11 Biology May Jun 2021 Quiz | Cambridge O-Level MCQ
Fitness training in athletes reduces the need for anaerobic respiration. It also increases the rate at which lactic acid is removed after exercise.
The table shows the concentration of lactic acid in the blood of four different athletes. They exercise for 20 minutes and rest for the next 70 minutes.
From the fittest athlete to the least fit, which order is correct?