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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). |
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| 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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