The fastest althlet in the world is Usain Bolt, his average speed in 200m race during Beijing Olympics was 23.1807 mph (100 m race average speed: 23.085 mph). Previous fastest athlet was 200m race record holder Michael Johnson. See: http://www.unitarium.com/speed?ch=007&val=10.3199 (Bolt 100m race) http://www.unitarium.com/speed?ch=010&val=10.3627 (Bolt 200m race )
Chat with our AI personalities