Chapter 47 - Musculoskeletal Systems - 47.2 - Many Factors Affect Muscle Performance - 47.2 Recap - Learning Outcomes - Page 1014: 2

Slow-twitch fibers have a higher capacity for oxidative metabolism since they have a large supply of blood vessels and mitochondria. These fibers used glycogen and fat as a fuel source and can maintain steady ATP production given an oxygen source. Fast-twitch fibers can maximize tension quickly, but lack the mitochondria to sustain the exertion. These fibers are suitable for short-term and high-impact work.

Slow-twitch fibers have a higher capacity for oxidative metabolism since they have a large supply of blood vessels and mitochondria. These fibers used glycogen and fat as a fuel source and can maintain steady ATP production given an oxygen source. Fast-twitch fibers can maximize tension quickly, but lack the mitochondria to sustain the exertion. These fibers are suitable for short-term and high-impact work.