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 competition. There was also a fourth straight win in the 4 × 100 metres relay with the Jamaica team (Nesta Carter, Asafa Powell, Nickel Ashmeade, Usain Bolt). The Americans initially had a lead, but a poor baton exchange saw them disqualified and Jamaica defend their title in 37.36 seconds – well clear of the Chinese team who took a surprise silver for the host nation. Conscious of his injuries at the start of the season, he did not compete after the World Championships, skipping the 2015 IAAF Diamond League final. Bolt competed sparingly in the 200 m before the Olympics,