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HMS, TIP 2012 HSC 20 MC

Which physiological adaptations occur in athletes when regularly training at submaximal levels to improve their aerobic performance?

  1. Increased cardiac output, decreased stroke volume and muscle atrophy
  2. Increased cardiac output, increased lung capacity and muscle hypertrophy
  3. Decreased resting heart rate, decreased haemoglobin levels and increased oxygen uptake
  4. Decreased resting heart rate, increased stroke volume and increased haemoglobin levels
Show Answers Only

\(D\)

Show Worked Solution
  • D is correct: Aerobic training decreases resting heart rate, increases stroke volume and haemoglobin.

Other Options:

  • A is incorrect: Stroke volume increases with aerobic training, not decreases.
  • B is incorrect: Aerobic training causes muscle adaptations, not significant hypertrophy.
  • C is incorrect: Haemoglobin levels increase with aerobic training, not decrease.