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T NATION on X: Simply put, those who reach a high level in sprinting have the genetics to be fast, powerful, strong, and muscular to begin with. Those who excel in endurance

T NATION on X: Simply put, those who reach a high level in sprinting have the genetics to be fast, powerful, strong, and muscular to begin with. Those who excel in endurance

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Are you born with a set amount of slow and fast twitch muscle fibers such as 50/50 or can that number change by your activity level, such as doing explosive power workouts

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They're Chasing Us Away from Sport”: Human Rights Violations in Sex Testing of Elite Women Athletes

The New Encyclopedia of Modern Bodybuilding : The Bible of Bodybuilding, Fully Updated and Revised: Schwarzenegger, Arnold, Dobbins, Bill: 9780684857213: : Books