EDMONTON, Alberta (AP) _ Former world record-holder Donovan Bailey said there's a 50-50 chance he will run in the 100 meters at the Canadian track and field championships which start Friday.

Bailey, the 1996 Olympic gold medalist who plans to retire after this season, has been hobbled by a bone spur on his right heel.

``Everything is 50-50 at this point,'' Bailey said after arriving in Edmonton on Thursday. ``I have to get therapy, I have to get adjusted. My entire body has to be straightened out.''

Bruny Surin has already said an injury will prevent him from running in the 100 meters at the national championships, which serve as a qualifying event for the World Championships to be held in Edmonton in August.

Bailey, who was first bothered by the injury in April, still won some races in Europe despite a slow best time of 10.20 seconds.

``It's definitely taken away from everything,'' he said. ``I'm favoring it when I walk and run. That's not very conducive to fast running.''

Bailey has been undergoing daily treatments for the heel injury.

``I have to get manipulated, the muscles have to get treated,'' he said. ``If it doesn't, I'm going to risk major injuries to my neck, back, hip, hamstring.''

The 100 final is scheduled for Saturday but Bailey wouldn't say when he will make his decision.

``I'm going to continue to train and get treatment and see how it goes,'' he said. ``I want to compete. It's my last Canadian championships that I will be competing in.''

Bailey wouldn't speculate on his status for the worlds.

``My intentions are to get this weekend over with and prepare for what lies ahead,'' he said. ``If I do all what I have to do then the World Championships will take care of itself. Right now it's a health issue not a speed issue.''