character: Jenny
topic: Fast-Twitch vs. Slow-Twitch Muscles
grade: 9
subject: Science
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character: Coach Smith
topic: Muscle Fiber Types and Performance
grade: 9
subject: Science
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character: Dr. Lee
topic: Physiology of Athletic Training
grade: 9
subject: Science
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character: Alex
topic: Impact of Muscle Fibers on Sports
grade: 9
subject: Science
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