HMS, BM EQ-Bank 179 MC

During a 400 metre sprint race, an athlete's performance is most dependent on which combination of energy systems?

ATP-PCr and Aerobic
Glycolytic and ATP-PCr
Aerobic and Glycolytic
Equal contribution from all three systems

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\(B\)

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B is correct: A 400 m sprint typically takes 45-60 seconds requiring both immediate energy from ATP-PCr for the explosive start and lactic acid system for maintaining the high-intensity effort throughout the race.

Other Options:

A is incorrect: Aerobic contribution is minimal during high-intensity 400m sprints
C is incorrect: Aerobic system isn’t significantly involved at this intensity/duration
D is incorrect: All systems don’t contribute equally in this event