2nd Principle fo Good Training - Progression

The second principle of good training is progression. This is when you make gradual changes in your training. This is where runners learn to increase mileage early in their training and gradually work toward interval training as the program progresses along. Usually a lot of runners peak too soon; that's why it is better to progress at a slower rate. Gradually work into your interval training sessions. Let your current race pace dictate your early workouts and adjust toward your goal pace for later workouts in the season.