World champion runner Jenny Simpson disclosed that a rare heart condition led to her experiencing cardiac arrest during a race in June, announcing that she will not resume her running career. Simpson, aged 39, shared on Instagram that she received a diagnosis of Arrhythmogenic Right Ventricular Cardiomyopathy (ARVC), a condition that resulted in “dangerous heart rhythms leading to a cessation of heart function.”

Due to the diagnosis, Simpson emphasized the risk associated with returning to running, stating that it would be perilous for her to do so. She expressed, “That chapter has ended,” while also noting, “Thankfully, my story hasn’t.”

The incident occurred while Simpson was assisting a group of girls in a mile run at an event in Raleigh, North Carolina, where she collapsed. Immediate CPR was administered at the track, and an automated external defibrillator was utilized before paramedics transported her to the hospital.

In a reflective tone, Simpson addressed the response she would appreciate after such a life-threatening event, urging individuals not to offer sympathy but rather express gratitude for her survival. She stated, “Please do not say that you’re sorry or that you feel bad for me. If it is true in your heart, please tell me you’re glad that I’m here. That’s how I feel — so glad that I’m still here.”

Simpson, renowned for her achievements as America’s leading women’s 1,500-meter runner from 2007 to 2017, clinched world titles in 2011, secured second place twice, and earned an Olympic bronze medal in Rio in 2016.