Principles of Strength and Conditioning
Type II fibers, also known as fast-twitch muscle fibers, are a category of skeletal muscle fibers that are characterized by their ability to generate quick and powerful contractions. These fibers are particularly important in activities that require short bursts of intense effort, such as sprinting or weightlifting. Type II fibers can be further divided into Type IIa and Type IIb fibers, each with distinct properties and energy utilization methods.
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