Hi. The fastest speed I would assume is by Usain Bolt.
Usain Bolt ran the 2009 World final in 9.58 seconds. That's an average of 23.35 mph or 37.578 km/h. Taking acceleration time to the finish into consideration - his top speed was 27.45 mph or 44.172 km/h according to the biomechanical analysis of his 9.58 record.
iNeedAdvice
2011-07-13 20:16:22 UTC
Walking
Elder
2011-07-13 20:13:37 UTC
15mph
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