"You must believe and adhere to the principle of UNENDING IMPROVEMENT and the setting and achieving of even higher goals." - Joe Vigil, San Diego USAT Arts & Sciences Symposium 2012
This quote from Joe's presentation in San Diego recently hit the spot with everything I agree and do. I am constantly using data from the athlete's workouts to determine the exact next step, so we can have "unending improvement," skipping over any performance plateaus.
With the increase of depth in the sport, more talented athletes in it, the difference between accomplishing goals and not is becoming a smaller and smaller margin. We can't afford to train poorly, or waste training days with too much recovery, too much training stress, or injury. Data will help you to do this. If you're not using data to do so, you do not believe and adhere to this principle.