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Is being fast at a high bodyweight genetic? Like nfl players who are 5 10 220 who run 4 4 40s?
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- Anonymous7 days ago
To some extent.
Anyone can increase their fast twitch muscle fibers and improve their speed.
If you take someone completely unathletic like Tom Brady. He runs a 5.3 40. He could probably get down to 4.5 if he trained for it for several years. Maybe 4.4. He won't ever beat Usain Bolt though no matter how much he trains.
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