"I am targeting the 3,000 metres indoor world record and, if things go to schedule, I will also try to improve on my 5,000 outdoor world record," Defar said.
The 23-year-old, who set the 5,000 metres world mark in New York last June, will launch her indoor season in Boston on January 27 and then compete in Stuttgart a week later.
"I will then decide whether to race in Kahlsruhe in Germany or Birmingham in Britain," she said.
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"I want to run no more than three races indoors then start my outdoor programme leading to the Osaka world championships."
The world indoor 3,000 record of eight minutes 27.86 seconds was set by Russian Liliya Shobukhova in Moscow in February 2006.
Defar, who won the world indoor title over the distance ahead of Shobukhova, has a best time indoors of 8:30.05.
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