Olympic 1,500-meter bronze medalist Jenny Simpson says her running chapter has ended following a collapse in June while pacing a mile group in Raleigh, North Carolina. The 39-year-old underwent CPR and was placed on life support due to heart and lung complications, later revealing a diagnosis of arrhythmogenic right ventricular cardiomyopathy. "My body was dying, but my spirit wouldn't give up," Simpson wrote on Instagram, thanking supporters for their intervention and love. Her heart and lungs recovered within days, but scar tissue disrupting her heart's electrical system made continued running dangerous.

Despite the diagnosis, Simpson expressed gratitude for her future, calling it "incredible" and full of purpose. She emphasized that while her love for running remains strong, returning to the sport would pose serious risks. Simpson will continue her role as chief running officer for Fleet Feet, a position she assumed in February.

A six-time national champion and former University of Colorado standout, Simpson won gold at the 2011 World Championships and bronze at the 2016 Rio Olympics. Her recovery story will be featured on "CBS Saturday Morning" and a podcast next month.