I don't believe Hadd ever said to "never run over 9:00 per mile." I think the debate went like this:
Some people thought he was advocating that pace for even ?fairly fast,? ?well-conditioned,? ?experienced? runners. Of course he was not. But he does believe in running most of one?s miles, particularly early in a base phase, at 70-75% of MaxHR. If that is 9:00 per or higher, so be it. That means you are pretty slow(no offense), & not in great shape. Later (which is this guy?s question?.when??) that same HR will produce (hopefully) faster paces than 9:00 per mile. Be patient. And, after several weeks of base training(12 or so?), your Lactate Threshold should rise, so once could actually later run the majority of one?s mileage at a slightly higher % of max HR than you started at, say 75-80% (because you would still not be threatening to go over the Lactate threshold, and be well in control of yourself. It would still be all aerobic).
That is my interpretation, and I believe it to be correct.
What I want an answer to is this: obviously this Heart Rate Reserve produces higher values than simply % of Max HR. So when you want to run at a ?75% effort??which is the better #? Hadd was obviously always talking about simply % of MaxHR. What does he, and others, think of HRR ??
My first thought is: if you use HRR, you should drop the %?s you usually use for %of HR max. As David wrote, run at 60-70% of HRR to somewhat equate to 70-80% of maxHR for easy/moderate aerobic runs. It should be a pretty similar HR #.
But I am unsure why one should train at a LOWER HR for a certain effort if they have a lower resting HR as opposed to a higher resting HR ? Because they are working harder to get that HR up to, say 140 from say 40, then someone else is working to get it to 140 from 60? That is logical, but?.the guy/gal at resting HR of 40, could very well be better conditioned, so?..why make him train ?easier? (lower % of max HR) than the other guy with resting HR of 60(who might not be in as good as shape) ? I don?t know if this makes sense or not to me. What do others think?