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HMS, BM EQ-Bank 346 MC

During a 400-metre sprint, an athlete experiences a rapid increase in lactate levels. Which statement correctly explains what happens to the athlete's body during this activity?

  1. The aerobic energy system is the primary energy provider, resulting in decreased lactate levels
  2. Lactate production increases as the body relies on the ATP-PCr system for energy
  3. The athlete's muscles use more oxygen, which reduces lactate production in the bloodstream
  4. Lactate accumulates in the muscles as the glycolytic system produces energy without sufficient oxygen
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Consider Option D: Lactate accumulates in the muscles as the glycolytic system produces energy without sufficient oxygen

  • During high-intensity activities like a 400-metre sprint, the body relies heavily on the glycolytic energy system, which produces lactate as a by-product when working anaerobically (without sufficient oxygen).
  • Lactate then accumulates in the muscles and bloodstream.

Other Options:

  • A is incorrect: The aerobic system is not the primary energy provider during a sprint and would not result in decreased lactate levels
  • B is incorrect: The ATP-PCr system does not produce lactate as a by-product
  • C is incorrect: The muscles are unable to use enough oxygen during high-intensity exercise, leading to increased (not reduced) lactate production