How much energy is expended from one liter of consumed oxygen?
a. 5 kcal
b. 10 kcal
c. 15 kcal
d. 20 kcal
Answer: a. 5 kcal
One liter of consumed oxygen expends 5 kilocalories of energy or 20.9 kilojoules.
The American College of Sports Medicine, ACSM, multiple choice questions with their answers.