fast-twitch

or fast·twitch

[ fast-twich, fahst- ]
/ ˈfæstˌtwɪtʃ, ˈfɑst- /

adjective Physiology.

of or relating to muscle fiber that contracts relatively rapidly, utilized especially in actions requiring maximum effort of short duration, as sprinting (distinguished from slow-twitch).

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anchorite
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020