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Results 1 - 1 of 1 for slow
  1. Is athletic performance determined by genetics?: MedlinePlus Genetics 
    ... made up of two types of muscle fibers: slow-twitch fibers and fast-twitch fibers. Slow-twitch muscle fibers contract slowly but can work ... twitch muscle fibers and increase the proportion of slow-twitch fibers in the body. Some studies have ...
    https://medlineplus.gov/.../understanding/traits/athleticperformance - Genetics