Approximately how many kilocalories of energy are expended when a subject exercises for 2 h at...

Question

Question

Approximately how many kilocalories of energy are expended when a subject exercises for 2 h at an average VO2 of 3.0 L per minute?

Answer 1

Answer #1

Subject is exercising at a VO2 of 3.0 L per minute.

As we know, approximately 5 kcal are burned, for every litre of oxygen consumed.

Multiplying, 3.0 L/min by 5 kcal/L

So, our subject is burning 15 kcal/min.

Total minutes subject is exercising= 2 hours ( 120min)

Therefore,

Total expended energy (in kcal) = 15 kcal/min X 120min

= 1,800 kcal.

Answer 2

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