Question

A lean long distance runner consumes 1.4 litre of pure oxygen per minute at STP during a long run.

(a) Calculate the energy metabolised per second based on this oxygen consumption.

(b) In a high-altitude event, the air pressure is 0.83 atm. What volume of oxygen will the triathlete require per minute now, assuming the same metabolic rate?

(c) What volume of air will be breathed per minute to obtain the quantity of oxygen in (b)? Assume dry air with normal oxygen concentration.

Answer 1