Preliminary round was introduced at Daegu 2011 only in the 100m , also used later in London and Moscow. It's the stupidest thing ever which allows e.g. women who run 12.50 to qualify for the heats and run two races (practically two rounds) while actually good sprinters who start the competition in heats can be eliminated in the heats with 11.50 (example) after only one race.
That's how Mikele Barber in Daegu was eliminated in the heats with 11.40 while gals with 12.40 were also eliminated in the heats but they ran more rounds despite their first round is called preliminary round.
That's how Mikele Barber in Daegu was eliminated in the heats with 11.40 while gals with 12.40 were also eliminated in the heats but they ran more rounds despite their first round is called preliminary round.
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