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 some to question the new rule, with former world champion Kim Collins saying it was "a sad night for athletics". Usain Bolt's countryman, Yohan Blake, won in a comparatively slow 9.92 seconds. In the World Championships 200 m, Bolt cruised through to the final which he won in a time of 19.40. Though this was short of his world record times of the two previous major tournaments, it was the fourth fastest run ever at that point, after his own records and Michael Johnson's former record, and left him three tenths of a second ahead of runner-up Walter Dix. This