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    Exercise Physiology

Muscle: Genes and Muscle Fiber Types

Can specific genes cause muscles to grow faster or stronger, and can genetic tampering give athletes an unnatural edge? Image: Courtesy of PeskyMonkey, via iStockphoto.com Sidebar Take a close look at the athletes competing in this year's Summer Olympic Games in London-their musculature will tell you a lot about how they achieved their elite status.

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