Erin Menefee’s doctors have a nickname for her: Supergirl. Similar to the comic book hero, the 26-year-old physical therapist has faced obstacles head-on with tenacity. But in her case, her superhuman strength comes in the form of running marathons less than two years after open-heart surgery. Menefee first noticed something wrong in December of 2015, when she took off on a long run during a break in her day at San Diego State University, where she was studying to become a physical therapist. At the time, the former collegiate runner for the University of Arizona was training for a transition...
