Cika wannan jumlar: Shekaru 13 kawai, Chemchumba ya yi gasa a gasar
1992 IAAF Gasar Cin Kofin Duniya, ta gama 27 a tseren matasa. Har yanzu a matakin matasa, ta halarci gasar 1994 da 1995 na Gasar Cin Kofin Duniya ta IAAF, inda ta kammala na 7 da na 10. A lokacin ta yi hutu a cikin gudu don mai da hankali kan karatu, inda ta kasance a baya. Ta halarci Makarantar Sakandare ta Kapkenda a shekarar 1997.