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Muscle Fiber Type Comparisons
Comparison of Type 1, Type IIa and Type IIx muscle fiber types
Comparison Type I Type IIa Type IIx
Fiber Size (diameter) Small Large Large
Contraction Speed Slow Fast Fast
Oxidative Capacity High Moderate Low
Fiber size is the diameter of the fiber (not length).
Class, please note: We never really isolate muscles fibers. Different types of exercise EMPHASIZE a fiber type more. That is why we use the word EMPHASIZE.
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