1 9 8 5 ▁London ▁Mar athon ▁ 2 : 2 1 . 0 6 ▁was ▁the ▁fast est ▁mar athon ▁time ▁for ▁ 1 3 ▁years . ▁ ▁Career ▁Krist ians en ▁started ▁her ▁career ▁quite ▁un remark ably , ▁running ▁ 2 : 3 0 ▁– ▁ 2 : 4 0 ▁for ▁her ▁first ▁few ▁mar ath ons . ▁She ▁won ▁the ▁bronze ▁medal ▁in ▁the ▁ 3 0 0 0 ▁metres ▁at ▁the ▁ 1 9 8 0 ▁World ▁Championships ▁in ▁Athletics ▁and ▁won ▁the ▁ 1 9 8 3 ▁Houston ▁Mar athon ▁in ▁ 2 : 3 3 : 2 7 ▁while ▁two ▁months ▁pre gn ant ▁-- ▁a ▁fact ▁she ▁didn ' t ▁know ▁until ▁two ▁months ▁later . ▁It ▁was ▁not ▁until ▁she ▁gave ▁birth ▁to ▁her ▁first ▁son , ▁Ga ute , ▁that ▁her ▁times ▁began ▁to ▁improve . ▁After ▁winning ▁the ▁Houston ▁Mar athon ▁again ▁and ▁the ▁London ▁Mar athon ▁in ▁ 1 9 8 4 , ▁she ▁placed ▁fourth ▁in ▁the ▁first ▁Olympic ▁women ' s ▁mar athon ▁in ▁Los ▁Angeles . ▁She ▁also ▁set ▁two ▁track ▁world ▁records ▁in ▁the ▁ 5 , 0 0 0 ▁m ▁( 1 4 : 5 8 . 9 ) ▁on ▁ 2 8 ▁June ▁ 1 9 8 4 ▁and ▁the ▁ 1 0 , 0 0 0 ▁m ▁( 3 0 : 5 9 . 1 4 ) ▁on ▁ 2 7 ▁July ▁ 1 9 8 5 , ▁at ▁the ▁Bis lett ▁Games ▁in