Effort and Impact on Long Runs

Despite the varying levels of effort exerted during long runs, the legs can still experience damage due to the resistance to impact. This dull feeling in the legs remains consistent regardless of the intensity of the run. The speaker aims for 70 to 80 miles per week for their marathon training, emphasizing the importance of adequate mileage for building confidence in handling the marathon, even though in an ideal world, they would aim for 140 miles per week.