Biology for IGCSE & O level - Respiration (Section 1 - No. 16)
Why do sprinters often hold their breath during a 100-meter race?
To allow more oxygen to reach the muscles.
To allow the body to cool down quickly.
To minimize the amount of carbon dioxide produced.
Because of the intense anaerobic respiration.
Explanation
The muscles rely on anaerobic respiration, which does not require oxygen, and the sprinters maximize the efficiency of their actions. They are also paying back their oxygen debt, hence the later heavy breathing.
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