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Ex Phys Home
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Muscle Fiber Type Comparisons |
Comparison of Type 1, Type IIa and Type IIx muscle fiber types |
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Comparison |
Type I |
Type IIa |
Type IIx |
Fiber Size (diameter) |
Small |
Large |
Large |
Contraction Speed |
Slow |
Fast |
Fast |
Oxidative Capacity |
High |
Moderate |
Low |
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Fiber size is the diameter of the fiber (not length). |
![](../Extras10/FiberType21.gif) |
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. |
![](../Media/spectrum.gif) |
![](../Extras2/muscle6.gif) |
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![](../Media/spectrum.gif) |
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