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Usain bolt top speed in km
- Usain bolt top speed in km
ABC News. The key determinant of footspeed in sprinting is the predominance of one distinct type of muscle fibre over another, specifically the ratio of fast-twitch muscles to slow-twitch muscles in a sprinter's physical makeup.
Usain bolt top speed in km -
Daily Telegraph 19 January This was the first m race featuring both Bolt and Powell since the final in the Olympics. Archived from the original on 17 February
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