[fast-twich, fahst-]
adjective Physiology.
of or pertaining to muscle fiber that contracts relatively rapidly, utilized especially in actions requiring maximum effort of short duration, as sprinting (distinguished from slow-twitch ).
Also, fasttwitch. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Fast-twitch fibers are designed for quick bursts of energy, but they fatigue quickly.
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