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

question 68

Multiple Choice

World-class sprinters typically do not breathe during the 9+ seconds needed to complete 100 meters. What does this suggest about their 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 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 once the race ends.

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