The type of fibers specialized to continue contracting for extended periods of time, as would be required in running a marathon, for example, are _____ fibers.

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The type of fibers specialized to continue contracting for extended periods of time, as would be required in running a marathon, for example, are slow fibers.

Slow fibers have numerous mitochondria that allow you to obtain large amounts of energy aerobically.

  • Its contraction speed is slow, providing it with high resistance to fatigue, thus maintaining exercise for hours, typical of endurance sports (marathon).

  • They are able to retain a longer duration of exercise at a more constant pace.

  • These fibers are important for endurance triathletes, those who compete in medium and long distance.

Therefore, we can conclude that the type of fibers specialized to continue contracting for extended periods of time, as would be required in running a marathon, for example, are slow fibers.

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