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Could you explain what a "fast & slow twitch dominant" is? In easy terms.
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fast and slow twitch refer to the two primary muscle fiber types. fast-twitch dominant 'types' are the ones primarily used in strength-dominated movement, slow-twitch in slower, easier movements. in layman's terms, a powerlifter has a greater percentage of fast-twitch muscle fiber. strength is related to both the number of fibers called upon, as well as their 'rate of firing', hence fast-twitch fiber moves more weight. marathon runners have more slow-twitch muscle fiber. this type is characterized by a less of a tendency to hypertrophy (grow) and by much greater numbers of cellular mitochondria, the part of the cell which utilizes oxygen to re-generate atp, the cellular 'energy dollar'. so, you could say the bulkier powerlifter is fast-twitch dominat and the marathoner is slow-twitch dominant. hope this helps.
ryan