Altitude training results in which of the following changes?

Altitude training results in which of the following changes?

• A. Increase in the amount of oxygen that can be transported
• B. Decrease in red blood cell count
• C. No change in oxygen transport
• D. Increase in lung capacity only

Answer: (A)

Altitude training tests how the body improves oxygen delivery when air has less oxygen. The main response is to boost the blood’s oxygen-carrying capacity by increasing red blood cell production. The kidneys release erythropoietin in hypoxic conditions, signaling bone marrow to make more red blood cells and hemoglobin. With more red blood cells, the blood can carry more oxygen from the lungs to working muscles, so the overall amount of oxygen that can be transported rises. That’s why this option is the best fit. The other possibilities don’t match the typical adaptation: red blood cell count does not decrease, oxygen transport does increase, and lung capacity isn’t the primary change associated with altitude training.

Altitude training tests how the body improves oxygen delivery when air has less oxygen. The main response is to boost the blood’s oxygen-carrying capacity by increasing red blood cell production. The kidneys release erythropoietin in hypoxic conditions, signaling bone marrow to make more red blood cells and hemoglobin. With more red blood cells, the blood can carry more oxygen from the lungs to working muscles, so the overall amount of oxygen that can be transported rises. That’s why this option is the best fit. The other possibilities don’t match the typical adaptation: red blood cell count does not decrease, oxygen transport does increase, and lung capacity isn’t the primary change associated with altitude training.