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Type II Muscle Fiber

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Type IIA FibersEdit

Type IIA fibers, or fast oxidative fibers, are used more during sustained power activities such as velocity and are more resistant to fatigue than Type IIB.

Type IIB FibersEdit

Type IIb fast-twitch fibers, or fast glycolytic fibres (also known as Type IIx), are recruited for very short-duration high-intensity bursts of power such as maximal and near-maximal lifts and short sprints.[1]

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