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HMS, BM EQ-Bank 168 MC

During a marathon run lasting over 3 hours, which energy system contribution would be most accurate?

  1. 70% aerobic, 20% glycolytic, 10% ATP-PCr
  2. 95% aerobic, 4% glycolytic, 1% ATP-PCr
  3. 85% aerobic, 10% glycolytic, 5% ATP-PCr
  4. 60% aerobic, 30% glycolytic, 10% ATP-PCr
Show Answers Only

\(B\)

Show Worked Solution
  • B is correct:
    • Marathon running is an endurance activity requiring sustained energy production (95% aerobic) over 3+ hours.
    • This can only be achieved through the aerobic system’s efficient use of oxygen and fuel substrates.

Other Options: 

  • A is incorrect: Glycolytic contribution too high for endurance event
  • C is incorrect: Percentages don’t reflect true duration demands
  • D is incorrect: Anaerobic contribution too high for marathon