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HMS, BM EQ-Bank 143 MC

During a 400 m race, an athlete experiences heavy legs and reduced performance in the final 100m. Which statement best explains this occurrence?

  1. Depletion of creatine phosphate stores
  2. Accumulation of lactic acid
  3. Insufficient oxygen supply
  4. Depleted glycogen stores
Show Answers Only

\(B\)

Show Worked Solution

Consider Option B: Accumulation of lactic acid

  • The glycolytic system produces lactic acid as a by-product causing fatigue

Other Options:

  • A is incorrect: CP stores are depleted in first 10 seconds
  • C is incorrect: While oxygen debt occurs, it’s not the primary cause of fatigue
  • D is incorrect: Glycogen depletion occurs in much longer events

\(\Rightarrow B\)