No one likes to fail, and yet, we all do. As a matter of fact, we fail quite often. As an athlete, I have failed spectacularly in some of my races. As a coach, I have prepared athletes to race and then watched them fail epically. In each painful scenario, something has triggered an unraveling of the months of training and pre-race work, resulting in a dismal day.

Source: The Positive Side of Failure – TrainingPeaks