It is advantageous for athletes to train at high altitudes for several weeks before an important competition at sea level, because during this time they develop an increase in A) the affinity of their haemoglobin for oxygen. B) the concentration of haemoglobin in their blood. C) their heart rate. D) their lung capacity. E) the partial pressure of O₂ at which their haemoglobin is saturated.

Question

Quizplus · Accepted Answer

Training at high altitudes, where oxygen levels are lower, stimulates the body to produce more red blood cells to carry oxygen more efficiently. This increase in red blood cells leads to a higher concentration of haemoglobin in the blood, improving oxygen delivery to muscles during competition at sea level.

It Is Advantageous for Athletes to Train at High Altitudes