When amputee athlete Jacky Hunt-Broersma says her mantra is, “I can do hard things,” she's not kidding — the amputee athlete has run 104 marathons in as many days, all using a carbon-fiber prosthesis. SOURCE: https://www.usatoday.com/story/sports/2022/05/02/arizona-athlete-world-record-marathons/9612931002/