A 40-year-old runner, wife, and mother of two said her ability to walk was temporarily stolen from her, and she was left with a dreadful diagnosis of congenital hip dysplasia.

From the Ironman World Championships to extreme triathlons in brutal cold, heat, and altitude, Fernando Lopez says he tackles some of the most unthinkable endurance competitions because he knows he can do it and uses these wild challenges to help others. For example, this weekend, he plans to complete a 100-mile run.