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Muscle Fibers

Muscle fibers are made up of three different types. The types are classified according to their cellular make up, contractile properties, and their biochemical make up. The fibers are divided into fast twitch fibers and slow twitch fibers. The majority of muscle groups in the body are composed of an equal mixture of slow and fast fibers 50%/50%. However, in the athlete these ratios change. In a tailback that is fast and explosive, we may see a mixture of 70% fast twitch fibers and 30 percent slow twitch fibers. In a cross-country runner we may see the opposite because they are slow and not explosive, we may see a 75% slow to 25% mixture. The mixture of fibers will greatly depict the ability of the athlete. This mixture of muscle fibers is part of an abundance of factors that make up talent. If you flipped the roles of the two above examples, the tailback would not have the muscle fiber ratio adequate to be as successful as a cross-country runner, and on the football field the cross country runner would not survive. (Click here to become a member and gain full access to the over 400 manuscript text pages of resource information in this website and many other wonderful benefits)

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