cotton shirt wrote:
the long run does not directly help you run 1500m in 3.5 minutes, it helps you do the training that is necessary for you to run 1500m in 3.5 minutes. without the long run you would not be able to do the required training.
This sums it up pretty well. A major component of sport development is training to train. Spending the better part of 2hrs on the track running tempos and intervals requires a very well developed aerobic capacity. A 90min easy run helps your body adapt to the demand of long periods of effort on your feet.
Sprinters train with a similar concept but instead of 90min runs we do long peroids in the weight room focusing on whole body exercises.