Question

hich of the following are used in endurance activities because they do not tire as quickly during exercise?

1Points
Large group of marathon runners.
A
slow-twitch muscle fibers

B
lactic acid

C
fast-twitch muscle fibers

Answer 1

Slow-twitch muscle fibers are used for endurance activities because they do not tire as quickly during exercise.

• An endurance activity refers to an activity that is used in increasing the heart rate of a person and helps them in breathing for an extended period.

• Slow-twitch muscle fibers are used because they use energy slowly and the energy is fairly used evenly in order to last for a long period of time. Therefore, this doesn't make the person run out of power.

In conclusion, the correct option is "Slow-twitch muscle fibers"

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