Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Of or relating to skeletal muscle that is composed of weak, slowly contracting fibers, adapted for low-intensity, high-endurance activities.

Etymologies

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Examples

  • This natural "springiness" is both genetic and conditioned: some people are born with more so-called "slow-twitch" muscles (making them good endurance athletes); others have more "fast-twitch" fibres (better at short bursts of speed or force).

    Think Yourself Fit: preparing the body 2012

  • Southcreek Global/Zuma Press The Tampa Bay Rays' on-deck circle The results, he says, prove that deviating from a normal swing just before hitting activates slow-twitch muscle fibers.

    Baseball's Weight Problem Craig Wolff 2011

  • This is in addition to the capacity of the slow-twitch fibers used in steady cardio.

    To Heal a Heart, Train Harder Katherine Hobson 2011

  • The fact is that we understand the bases for that difference (ratio of slow-twitch to fast-twitch muscle fibers). 100 years from now it may be equally accepted science that IQ or other learning capacity has a similar genetic component.

    The Volokh Conspiracy » Approaching Arguments That Have A Racist Past 2010

  • It's quite embarrassing when you see what the sprinters can do, but we're all about slow-twitch muscles.

    Small Talk | Men's coxless fours: 'The Winklevoss twins? They're a bit geeky actually' 2011

  • I was never going to be a sprinter -- all slow-twitch muscles -- so the only way I was gonna outrun somebody was to get a long lead and go for the marathon.

    Smart Martial Artists Steve Perry 2010

  • The fact is that we understand the bases for that difference ratio of slow-twitch to fast-twitch muscle fibers. 100 years from now it may be equally accepted science that IQ or other learning capacity has a similar genetic component.

    The Volokh Conspiracy » Approaching Arguments That Have A Racist Past 2010

  • East Africans, especially in a particular Kenyan valley, have more slow-twitch fibers and dominate in distance running.

    Academia, Harvard Law School, and freedom of speech 2010

  • There would be no fair way to divvy up the competitors according to weight or muscle mass or percentage of slow-twitch muscle, because for any of those you will find a woman who seems to be at an “advantage” greater muscle mass than the fastest-running male but who would still lose.

    Too fast to be a girl « Gender Across Borders 2009

  • I do my cardio every day, but I'm no distance runner not a lot of slow-twitch muscle on me.

    In a Forwardly Direction Amanda@Lady Scientist 2009

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