Exercise physiology · Physiology

Which change occurs in skeletal muscle fibers as a result of endurance training?

  1. Decrease in mitochondrial density
  2. Increase in capillary supply
  3. Shift from type I to type II fibers
  4. Reduced oxidative enzyme activity
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Correct answer: Increase in capillary supply

Endurance training increases capillary density, improving oxygen delivery to muscle fibers. It also enhances oxidative capacity rather than reducing it.

Difficulty: Medium Question 3 of 20

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