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
Vigorous cardio sprints also make use of fast-twitch muscle fibers, which tend to diminish rapidly with age, Nicola points out.
—
Erica Sloan, SELF, 25 Nov. 2025
Running about eight of the 100-yard dashes once a week can help build and maintain fast-twitch muscles, without stressing the body as much as a speed interval workout.
—Eleanor Yang Su, San Diego Union-Tribune, 25 Nov. 2025
Men typically have more fast-twitch muscles that are helpful for quick and powerful movements, while women tend to have more slow-twitch muscles that can allow for more workout efficiency.
—Tom Gavin, EverydayHealth.com, 3 Nov. 2025
Latency is still not as low as cable or fiber, which can matter for fast-twitch gaming.
—Roxanne Downer, USA Today, 27 Oct. 2025
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
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
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Erica Sloan, SELF, 25 Nov. 2025
Running about eight of the 100-yard dashes once a week can help build and maintain fast-twitch muscles, without stressing the body as much as a speed interval workout.
—Eleanor Yang Su, San Diego Union-Tribune, 25 Nov. 2025
Men typically have more fast-twitch muscles that are helpful for quick and powerful movements, while women tend to have more slow-twitch muscles that can allow for more workout efficiency.
—Tom Gavin, EverydayHealth.com, 3 Nov. 2025
Latency is still not as low as cable or fiber, which can matter for fast-twitch gaming.
—Roxanne Downer, USA Today, 27 Oct. 2025
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
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
Cite this Entry
“Fast-twitch.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fast-twitch. Accessed 5 Dec. 2025.
Copy CitationMedical Definition
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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