Just curious as to whether or not you believe this is attainable for someone with average talent. I have been running for 1.5 years and have a PR of 17:07 for 5-K. My training is for 5-K alone. I have no interest in the longer distances. My training consists of 4 workouts per week with the rest being recovery runs. My long day is a 10 miler with the last mile as hard as possible. One day is for VO2 max, another is a 20 minute tempo effort, and the last is a 45 minute progression run. I'm not asking for training advice, as this is what my training will remain at. I don't have the time to add mileage or intensity, etc. I'm wondering what you think can be achieved off of this type of regimen in the future.