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Fri Feb 26, 2016 09:04
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  • The fast twitch fibers.. - ., Tue Dec 1 14:43
    The fast twitch muscle fibers are responsible for giving the athlete his speed, agility, quickness, and power. Fast twitch fibers are up to 10 times faster than slow fibers. In most muscles, these... more
    • keeping the site (nm) - 1, Fri Feb 26 09:04
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