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fast-twitch



Pronunciation: (fast'twich", fäst'-), [key]
adj. Physiol.
of or pertaining to muscle fiber that contracts relatively rapidly, utilized esp. in actions requiring maximum effort of short duration, as sprinting (distinguished from slow-twitch). Also,fast'twitch".

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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