▁Os lo . ▁ ▁In ▁ 1 9 8 5 ▁she ▁won ▁the ▁London ▁Mar athon ▁again ▁in ▁a ▁new ▁world ▁record ▁of ▁ 2 : 2 1 : 0 6 , ▁the ▁previous ▁record ▁was ▁ 2 : 2 2 : 4 3 , ▁set ▁in ▁the ▁ 1 9 8 3 ▁Boston ▁Mar athon ▁by ▁Joan ▁Ben oit . ▁Later ▁in ▁ 1 9 8 5 ▁she ▁lost ▁to ▁Ben oit ▁in ▁the ▁Chicago ▁Mar athon , ▁running ▁ 2 : 2 3 : 0 5 ▁for ▁second ▁place . ▁▁ 1 9 8 6 ▁was ▁Krist ians en ' s ▁best ▁year ▁in ▁track . ▁After ▁she ▁won ▁the ▁Boston ▁Mar athon ▁in ▁hot ▁conditions , ▁she ▁set ▁a ▁new ▁world ▁record ▁in ▁the ▁ 1 0 , 0 0 0 ▁m ▁( 3 0 : 1 3 . 3 ), ▁sm ash ing ▁her ▁own ▁world ▁record ▁from ▁ 1 9 8 4 ▁by ▁ 4 6 ▁seconds . ▁Then ▁she ▁broke ▁the ▁ 5 , 0 0 0 ▁m ▁world ▁record , ▁running ▁ 1 4 : 3 7 . 8 9 . ▁On ▁ 5 ▁April ▁ 1 9 8 7 , ▁she ▁won ▁a ▁half ▁mar athon ▁in ▁Sand nes , ▁running ▁ 1 : 0 6 : 4 0 , ▁but ▁the ▁course ▁was ▁not ▁measured ▁properly ▁and ▁the ▁world ▁record ▁still ▁remained ▁with ▁Joan ▁Ben oit . ▁She ▁won ▁the ▁Chicago ▁Mar athon , ▁once ▁again ▁in ▁hot ▁and ▁hum id ▁conditions , ▁running