A professional runner going 4 years without a single PR. In ANY distance. That would be enough to crush you, make even the most mentally tough runner doubt themselves, but Sarah Crouch held on to her desire to run fast, and kept putting herself in races; marathons and half marathons, until finally it came. When she ran as hard as she could from the start, and held on. First woman at Chicago Marathon, with a tumor being removed just days before the race, this is one inspirational woman.