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Sylvia Kibet , the 2009 world championship silver medallist at 5,000, runs a workout two weeks prior to the 2011 Kenyan track and field trials. Here you get to see the 600 meter rep of a long workout of 2000, 1600, 1200, 1000, 800, 600, 400, 200, and 100 meters. More here: http://www.letsrun.com/2011/kibet-0714.php