How come the 110m Hurdles athletes never compete in the 100m Sprint?

I just think its weird since its still a sprinting event. Bolt competes in 100m and 200m, so why cant liu xiang or robles compete in 110mH and 100m?|||Hurdlers are sprinters. They are sprinting over barriers.


There were at one time people who were Olympic champions in the 100 and 110, but it is not possible now.


There are too many world class runners and the training for each event requires more time.


Think about the hurdlers who run 110 meters running over 10 barriers that are 42 inches tall and doing it under 13 seconds.


That means they can probably run the 100 in around 10 seconds, which would make them an elite 100 meter runner, but not an Olympic champion.