| 1. | Olympic sprinters have an abundance of fast-twitch muscle fiber.
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| 2. | His limbs would occasionally twitch, but not at his will.
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| 3. | Light, the striped shadows of the cattails twitch like nerves.
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| 4. | Just the right combination of fast and slow twitch muscle fibers.
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| 5. | It's the ability to make fast-twitch decisions.
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| 6. | His body is a raw synapse of twitches and serpentine gestures.
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| 7. | No, I didn't seem him twitch his pinky.
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| 8. | Not a flinch, not a buckle, not a twitch.
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| 9. | The silicon fingers twitch just enough to release an electrical pulse.
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| 10. | Like Troy, he's all quick-twitch energy.
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