The 400 metre hurdle event made a brief disappearance , making the 1912 Olympics the only time that event was not held since its introduction in 1900 .
The 5000 and 10000 metre races were introduced , as the 5 mile event was eliminated .
The 400 metre hurdle event made a brief disappearance , making the 1912 Olympics the only time that event was not held since event 's introduction in 1900 .
The 5000 and 10000 metre races were introduced , as the 5 mile event was eliminated .