HMS, BM 2018 HSC 18 MC

The graph shows the percentage of energy produced in a variety of activities

Based on the graph, which of the following statements is the most accurate?

After two seconds no more ATP is created.
Stored energy plays a very small role in a vertical leap test.
The lactic acid system is the major source of energy at the end of a 100-metre sprint.
Aerobic energy is the major source of energy from the 10-second mark in a 400-metre sprint.

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\(C\)

Show Worked Solution

C is correct: 100-metre sprint duration matches timeframe where lactic acid system dominates energy production.

Other Options:

A is incorrect: ATP continues to be produced by different systems after two seconds.
B is incorrect: Stored ATP plays a major role in explosive movements like vertical leaps.
D is incorrect: 400-metre sprint relies heavily on anaerobic systems, not primarily aerobic energy.

♦♦ Mean mark 45%.