The 100 meter dash is a quick and short run requiring explosive speed. On comple

Question

The 100 meter dash is a quick and short run requiring explosive speed. On completion of the dash the runners will continue to breathe hard for several seconds to minutes even though they are no longer running. Which of the following is the best explanation for why this is so?

A) Slow oxidative fibers are recruited last and have only started to work at completion of the run. B) Since the exercise was mostly aerobic exercise, the runners' bodies have not yet realized the run is over. C) The runners' use of stored oxygen, glucose and creatine phosphate is being replenished and this requires a prolonged increase of oxygen intake. D) The runners' fast oxidative muscles are so slow to utilize oxygen it only begins aerobic respiration by the time the run has finished

Explanation / Answer

Answer Option C) The runners' use of stored oxygen, glucose and creatine phosphate is being replenished and this requires a prolonged increase of oxygen intake.

During strenuous exercise or running body cannot produce enough oxygen. The muscles cell produces lactic acid instead of pyruvic acid. More CO2 in the body makes lungs to breath more for oxygen intake.

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