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Types Of Fibers That Make Up The Muscle

You might have come across people in gym who come there daily for their muscle building or have got really impressive muscles but they fail to give the reason for the growth of such big muscles? Many people don’t know why their muscles grow when they do weight lifting at gyms. Here is simple explanation. The muscles are composed of three types of fibers. Slow twitch fibers and fast twitch fibers A and B.

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