how much wrote:
Does it make sense for someone to run high mileage when his average pace results in three hours of running every day? isn't three hours way too much time? this is a training plan that includes a long run (which ends up being over 3 hours) a tempo run and a speed work out.
If you ran 7:30 pace for 21 hours that's 168 miles per week, 7:00 pace is 180 miles. Maybe you could peak at that for a few weeks while base training for an ultra. But that kind of mileage at that slow of a pace is waaaaay too much. I'm sure there are some marathoners who run that mileage but they are elite and probably average close to 5:30-6:00 pace for that kind of mileage, which for 170 miles at 5:45 pace is a more manageable 17 hours.