are white or red muscle fiber fast twitch?
SHARE SHARE TWEET EMAIL. Your body has two major types of muscle tissues: fast twitch and slow twitch. The fast-twitch muscle fibers are known as the white muscle, while the slow-twitch muscles fibers are known as red muscle.These two types of muscle fibers are engaged differently depending on what type of activity you are doing.hite muscle fibers have earned the name âfast twitchâ because they contract in .01 seconds or less. Their contractions are fueled by oxygen, which contributes to the white color. Elite sprinters may have up to 80% more white muscle fibers than red since their performance relies on this type of tissue.