Question

A marathoner uses mostly _____twitch fibers.

Question 2 options:

fast


slow


small


large
please answer back

Answer 1

Explanation:

Fast Twitch Muscle Fiber Types. The two types of skeletal muscle fibers are slow-twitch (type I) and fast-twitch (type II). Slow-twitch muscle fibers support long distance endurance activities like marathon running, while fast-twitch muscle fibers support quick, powerful movements such as sprinting or weightlifting.