At high altitude the partial pressure of oxygen in the air is low. A person newly arrived at high altitude produces more lactate during exercise than they would at sea level.
Explain why this person produces more lactate during exercise at high altitude.
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The respiratory quotient (RQ) measured for this person during intense exercise can be greater than 1.
Suggest why.
[2]
After several weeks at high altitude the person copes with exercise better.
Suggest one long-term change in the body that could explain this and how it helps.
[2]