Short-distance sprinters like Asafa Powell probably have more slow muscle fibers than fast muscle fibers in their legs.

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Short-distance sprinters like Asafa Powell have more fast-twitch muscle fibers (type II) than slow-twitch muscle fibers (type I) in their legs. Fast-twitch fibers provide rapid, powerful contractions needed for sprinting, while slow-twitch fibers provide sustained contractions needed for endurance activities.

Short-Distance Sprinters Like Asafa Powell Probably Have More Slow Muscle