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A 200 metres Dash race is a sprint running event. Despite the fact that it is often a faster race than the 100 m, it is less popular than the 100 metres Dash, and often attracts runners from that event who wish to "double up" and claim both titles.
This feat has been achieved eight times at the Olympic Games, the last by Carl Lewis in 1984. An Olympic double of 200 m and 400 metres Dash
To most trained runners, this is a pure power race. A slightly shorter race, run on a straight track, was the first recorded event at the Ancient Olympics. Despite being twice as long as the 100 m, the best 200 m runners can run a 200 m in a time similar to or even faster than double their 100 m time.
This is primarily because the athlete comes into the final straight at full speed already, therefore enabling them to run the second half of the 200 m faster than an athlete can usually run a regular 100 m.
For example, Michael Johnson's world record represents an average speed of 10.35 m/s (37.3 km/h or 23.1 mph), faster than the average speed for the current 100 m world record of 9.74 s, which represents an average speed of 10.27 m/s (37.0 km/h or 23.0 mph).
Masters 200 metres All-Time World Rankings