I, for one, think that this thread and subject in general is very interesting.
So, Tinman:
You think that everything stated in Hadd's giant thread makes sense?? Is there such thing as a pace that is too slow for EASY days? I remember several times seeing that Shorter logged plenty of miles on his easy days at near 9:00 pace. Several other "greats" have been known to run butt-dragging slow on easy days.
I'm not saying that slow training is the one-true-way to the top, but on easy days, does it really matter how slow you are going as long as you hit the mileage you need (desire), a long run, a 20 min LT run, some short striders at mile pace, and a run approaching the aerobic threshold???
I know from my own experience after a long layoff from running (and especially racing) that 3 months of 60 miles per week at 8:00-9:00 pace of "just running slow and FOR FUN" produced a time that was only 15 seconds off of my all-time 5k PR and I hadn't run that fast IN YEARS!!
I just found this topic quite interesting and this stuff makes sense, seeing as how the mile race is 65% aerobic, 3k is 75% aerobic, 5k is about 80% aerobic, 10k is 90%, and marathon is nearly 100% aerobic, so why not run a pace that is 100% aerobic, be it 7:30 pace (the top end) or 9:00 pace (the lower end). IF 9:00, you are doing nothing but saving energy while still accomplishing the goal for the day, right?