Recently, I emailed a buddy of mine to see if he wanted to get a run or ride in together during the work week. He is an accomplished athlete and, like me, works a full-time job. His response caught me a little off-guard as I expected a resounding "yes!" Instead he replied with a list of his workouts and the rather cryptic message "I am not doing many filler miles." I wanted to reply, "Well, there's your problem," as I had always thought he hadn't reached his potential as a runner, but then I drew a distinction between consistency and mileage. He was trying to tell me that he was getting all his workouts in, but he wasn't a slave to the mileage as he once was, perhaps. Read on...