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Last Updated: Monday February 16 2009 17:01 GMT

UK sprinter is 'world's fastest'

Dwain Chambers at the European Indoor Trials and UK Championships in Sheffield

Controversial British sprinter Dwain Chambers has hit the headlines again by equalling the world's fastest time for running 60m in just 6.51 seconds.

Chambers clocked up the record time at the European Indoor Trials and UK Championships in Sheffield on Saturday.

He's thought by many to be Britain's best sprinter, but Chambers hasn't always been a role model for athletics.

In 2003, he said he used performance-boosting drugs and was banned from competing at the Olympics for life.

GUIDE
Unidentified pills
He's still allowed to race at other events, but since he owned up Chambers has had a massive fight on his hands to clear his name and reputation since going clean.

Last year, he lost his fight to be allowed to compete at the Beijing Olympic Games although he is now set to star in a World Championship in March.

New rules

Drug testing is a massive deal in the world of sport.

Since the beginning of the year, new rules have been introduced to make it much tougher for drugs cheats to get away with it.

One of the biggest changes is that athletes have to be able to tell officials where they'll be for a full hour, every day in case they're needed to take a random drugs test. And if they miss any of the tests they face big trouble.

Not happy

Christine Ohuruogu
Christine Ohuruogu was banned for a year after missing three drugs tests
Someone who knows all about that is Olympic gold medallist Christine Ohorougu.

She was banned from competing for a year back in 2006 after missing three drugs tests in the space of 18 months.

But although the new rules are designed to crack down on drugs in sport, some athletes aren't happy as they say it's messing up their training schedules.