World-Class Sprinters Typically Do Not Breathe During the 9+ Seconds

question 86

Multiple Choice

World-class sprinters typically do not breathe during the 9+ seconds it takes to complete a 100-meter race.What does this fact suggest about these runners' energy production?

• A) It must be mitochondrial, with oxygen provided by one big breath at the beginning of the sprint.
• B) It must be mitochondrial, with oxygen provided by circulating hemoglobin that is already saturated with oxygen.
• C) It must be glycolytic; the process is entirely anaerobic and the race will be over before NADH+ reserves are depleted.
• D) It must be fermentative, which explains why most sprinters experience cramping after the race ends.

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