Bolt is aiming for his first world championship title

The world recorder holder and triple Olympic champion has said in London that he had a lot more work to do.

The 22-year-old Jamaican has been struggling with an ankle problem.

"I am not in the best shape right now, but I am getting there, slowly but surely. I still have a lot of work to do on technical stuff so I am looking for that."

Bolt recently won the 100 and 200 metres races at the Jamaican Championships in Kingston but with a slower time than in Beijing.

He has just visited a London school to coach young athletes in his running technique.

The aspiring athletes were thrilled.

"It makes me feel like how I can get up to that level how he makes me get onto that level, you know," said sprinter Mark Anthony.

'Not worried'

Another, Mya, added that she thinks Bolt can go faster than in Beijing.

She said: "Because he slowed down in the Olympics, but still won, that shows that he is still faster. You know he can, if you put your mind to it, you can do something."

Bolt seemed to agree that he had more to give.

"I take it one step at a time for its always about the World Championships. The time will come if I train hard and work and work really hard. I am not worried about that."

Bolt will be facing some tough competition in Berlin, including from American Tyson Gay who has said he has returned to full fitness.

The pair are scheduled go head to head for the first time this season at the Aviva London Grand Prix at Crystal Palace in London on 24-25 July.

Bolt has dismissed Gay's claims that he can steal the Jamaican's world 100m record.

Jamaican Bolt holds the mark with 9.69 seconds set at the 2008 Beijing Games but Gay says he may beat that after clocking 9.75 at the US trials.

	Bolt suffered minor leg injuries in a car crash in April.

"No disrespect to Tyson but that is going to be a hard task for him, he is more of a 200m runner," Bolt said.

Fast food

Bolt also hinted that he may compete in the 400 metres in future.

"I think maybe next year I may try it, I think I can maybe run 44 seconds," he said.

Since Bolt became the fastest man alive, he has maintained his laid-back persona and is in no rush to give up the chicken nuggets that powered him to victory in Beijing.

"I do eat too much fast food maybe. I do like to enjoy myself," he admitted.

But he added: "I know what it takes to get to the top. It's all about hard work and dedication. That's what makes me the fastest man in the world."