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Fast-Twitch vs Slow-Twitch Muscle Fibers

Fast-Twitch vs Slow-Twitch Muscle Fibers Fast-twitch muscle fibers (Type II fibers) are those responsible for explosive movements such as sprints, box jumps, and power cleans. Slow-twitch muscle fibers (Type I fibers) fire more slowly and can go for a longer time without getting fatigued. Muscle fiber composition is largely determined by genetics. On average, people […]

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