A world champion runner has announced her retirement due to a rare heart condition. The condition, known as Arrhythmogenic Right Ventricular Cardiomyopathy, triggered a cardiac arrest during a race. This condition leads to irregular heart rhythms that can be life-threatening.

The runner had been pacing a group when she collapsed and received emergency treatment, including CPR and defibrillation, before being taken to the hospital. Her diagnosis means that returning to running would be unsafe.

Further details about the runner's condition and her decision to end her running career are available from her personal statement.