What are fast twitch muscles?

Fast twitch fibers generally produce the same amount of force per contraction as slow muscles, but they get their name because they are able to fire more rapidly. Having more fast twitch fibers can be an asset to a sprinter since she needs to quickly generate a lot of force. read more

Moderate fast-twitch muscles are thicker, quicker to contract, and wear out more rapidly than slow-twitch. Fast-twitch, the most powerful and lowest in endurance, are activated when the body nears maximum exertion. read more

Muscle fibers are classified into two main groups Type I (slow twitch) and Type II (fast twitch). Type II fibers are further broken down into subclasses IIa, fast twitch oxidative-glycolytic) and IIx, fast-twitch non-oxidative. read more