Every long-time runner has experienced this phenomenon: week after week of great runs suddenly interrupted by one of the worst workouts in years, for no logical reason. I've found that the most successful athletes don't dwell on the bad days; instead, they're eager to move on to the next day's training or upcoming race.

Successful runners know that bad days don't last and aren't a true indication of their fitness. Bad days are just a freak occurrence that must be tolerated on the path to your goals. Running is hard but fun, and that short statement should tell us that there will be good days and there will be bad days. Live through both. Neither lasts forever.