She was an active and healthy girl who had just joined her school's squash team.
But yesterday, Nur Aisyah Ismail (above), 13, collapsed in school after a 2.4km run.
She died in hospital.
Tragically, yesterday was also her 13th birthday, which her family had planned to celebrate with her twin brother.
Her father, Mr Ismail Adan, 50, said: "I hoped that it was all just a dream, but she was just there lying on the bed, motionless."