Olympic hurdles champion Dawn Harper-Nelson has released an extraordinary video message saying she feared for her life because sports drug authorities had banned her from taking important blood pressure medication.

Hamstring issues and a few bad technique habits have Canberra sprinter Melissa Breen behind the eight ball.

Mo Farah ended his indoor career with a new European record, winning the 5000 metres at the Birmingham Indoor Grand Prix on Saturday in a time of 13 minutes 09.16 seconds.

Canberra Olympian Kelsey-Lee Roberts returns to the field for her first event of the season at the AIS.

Canberra Olympian Lauren Wells has felt a "buzz" in Canberra since the Usain Bolt-led Nitro Athletics.

Embattled Jamaican sprinter Nesta Carter has filed an appeal to the Court of Arbitration for Sport after he was retroactively found guilty of doping at the 2008 Beijing Olympics.

Jamaican sprint great Usain Bolt says he has no regrets about his decision to retire from athletics in 2017 as he has accomplished everything he wants to in the sport.

World silver medallist Kim Mickle's AFL dream was satisfied when she ran out for Fremantle at the weekend. But the dream has come at a cost with two sports now counting the cost of injury.  

Usain Bolt-inspired success of inaugural series is likely to be replicated overseas later this year.

The first Nitro athletics meet ended with Usain Bolt and his teammates standing atop the podium on the edge of the field at Lakeside Stadium.

Nitro Athletics took over Lakeside Stadium for three nights over the past week and a half, with some asking why people attended an event primarily made for television. One of the obvious answers was: "Here to see Bolt".

Mariya Savinova, the Russian athlete who shot to worldwide fame after her picture accompanied nearly every article about her country's alleged state-sanction doping scandal, has been stripped of her Olympic gold.

IAAF chief executive Olivier Gers met Cricket Australia counterpart James Sutherland in Melbourne on Friday as IAAF president Sebastian Coe said elements of the Nitro series could be incorporated into in world championships, and even Olympics.

Crowds left the stadium believing Australia had done the improbable. Bolt was indignant ... until the rules were double-checked.

If there was a perfect night to get run down by a lofty, long-legged Brit, Nitro offered it.  

Though sympathy alone can't alter facts; it can help to make them more bearable.

Teenage sprint sensation Jack Hale will be swung to the back straight on Thursday night setting up the tantalising prospect of him going head-to-head with Usain Bolt.

Sally Pearson's long-time rival, American Dawn Harper-Nelson, has been suspended for three months after testing positive for a banned substance.

The governing body of world athletics (IAAF) has put an immediate stop to changes of nationality by athletes, saying the system has become open to abuse and that rules are being manipulated.