fast-twitch
adjective
: of, relating to, or being muscle fiber that contracts quickly especially during brief high-intensity physical activity requiring strength compare slow-twitch
Examples of fast-twitch in a Sentence
Recent Examples on the Web
His fast-twitch muscles are rivaled by a select group of players in the association, including, of course, his brother, Amen.
—
Hunter Patterson, New York Times, 10 Oct. 2025
Box Jumps While technically a plyometric exercise, this movement also challenges the lower body muscles and fast-twitch muscle fibers.
—Jakob Roze, Health, 24 Sep. 2025
Her fast-twitch muscle fibers, which are associated with speed, resembled those of a healthy 70-year-old — good for her age but not exceptional.
—The Washington Post, San Diego Union-Tribune, 2 Sep. 2025
Orr’s own wit is as quick as the fast-twitch muscles that carried him to hockey glory, but at heart the Hall of Famer is a salt-of-the-earth kind of guy.
—Mike Dojc, Forbes.com, 7 July 2025
On the other hand, type 2 muscle fibers (a.k.a, fast-twitch) power anaerobic work, or that which taps into strength and power—yes, like lifting—which can’t be sustained for a long time, Dr. Aguillard explains.
—Danielle Zickl, SELF, 11 June 2025
Some people may have a higher proportion of fast-twitch muscle fibers with greater growth potential.
—Alyssa Hui-Anderson, Verywell Health, 16 May 2025
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Hunter Patterson, New York Times, 10 Oct. 2025
Box Jumps While technically a plyometric exercise, this movement also challenges the lower body muscles and fast-twitch muscle fibers.
—Jakob Roze, Health, 24 Sep. 2025
Her fast-twitch muscle fibers, which are associated with speed, resembled those of a healthy 70-year-old — good for her age but not exceptional.
—The Washington Post, San Diego Union-Tribune, 2 Sep. 2025
Orr’s own wit is as quick as the fast-twitch muscles that carried him to hockey glory, but at heart the Hall of Famer is a salt-of-the-earth kind of guy.
—Mike Dojc, Forbes.com, 7 July 2025
On the other hand, type 2 muscle fibers (a.k.a, fast-twitch) power anaerobic work, or that which taps into strength and power—yes, like lifting—which can’t be sustained for a long time, Dr. Aguillard explains.
—Danielle Zickl, SELF, 11 June 2025
Some people may have a higher proportion of fast-twitch muscle fibers with greater growth potential.
—Alyssa Hui-Anderson, Verywell Health, 16 May 2025
Cite this Entry
“Fast-twitch.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fast-twitch. Accessed 29 Oct. 2025.
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fast-twitch
adjective
: of, relating to, or being muscle fiber that contracts quickly especially during brief high-intensity physical activity requiring strength compare slow-twitch
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