Dictionary.com
definitions
  • synonyms

fast-twitch

or fast·twitch

[fast-twich, fahst-]
adjective Physiology.
  1. 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).
Show More
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018