Usain Bolt push Bolt to do longer sprinting distances with the aim of making the 400 m event his primary event by 2007 or 2008. Bolt was less enthusiastic, and demanded that he feel comfortable in his sprinting. He suffered another hamstring injury in March 2006, forcing him to withdraw from the 2006 Commonwealth Games in Melbourne, and he did not return to track events until May. After his recovery, Bolt was given new training exercises to improve flexibility, and the plans to move him up to the 400 m event were put on hold. The 200 m remained Bolt's primary event
Usain Bolt in Paris and Stockholm the following month, as did a 100 m in Monaco, though he was a tenth of a second slower than compatriot Asafa Powell before the world championships. Considered the favourite to win in the 100 metres at the 2011 World Championships in Daegu, Bolt was eliminated from the final, breaking "ridiculously early" according to the starter in an interview for BBC Sport, and receiving a false start. This proved to be the highest profile disqualification for a false start since the IAAF changed the rules that previously allowed one false start per race. The disqualification caused