Directory For a Sex Photos : Knowing an individual’s ratio of muscle fibers can help you design a more effective training program. Individuals who are slow-twitch dominant will benefit more from higher volumes of training, while fast-twitch dominant athletes will progress
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» Knowing an individual’s ratio of muscle fibers can help you design a more effective training program. Individuals who are slow-twitch dominant will benefit more from higher volumes of training, while fast-twitch dominant athletes will progress