World champion hurdler Jana Pittman has fallen into one of the lowest periods of her career, struggling to regain strength and speed after being diagnosed with a misaligned pelvis.

The usually vivacious Pittman was visibly disappointed when she crossed the finish line to win the 300 metres at the Telstra A-series in Canberra in a time of 37.92 seconds, substantially slower than the 36.34 she clocked over the same distance a year ago.

Pittman then pulled out of the 200m final and her coach Phil King instead made her run four individual 250m sessions within eight minutes.

She admitted she hated running below her best and was not used to injury upsetting her training and racing schedule.

"Since my profile has built up, and since I've become more dominant, on the track I haven't run poorly before," Pittman said.

"I love getting out there and being on the track and waving at people, it's just what I do.

"So to be denied what I do - I train to race - and not be allowed to get Christmas, then it's not fair.

"I get very emotional when I'm hurt."

The 21-year-old said she would use the experience and the trouble with her pelvis, which has affected her knee, to make changes to her life and refocus ahead of the Olympics.

She suffered a set back a week prior to last year's world championships when she had a bad run in Zurich and turned it into a positive.

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