Yes, I know you wind up running your slow runs more slowly than you're used to but:
I find, on the treadmill at least, that at 60 to 70% of MHR, I'm running at 5 to 5.5 miles per hour,
when I ordinarily run my slowest treadmill runs at 7 mph. And those runs, though they feel like a
good workout, aren't terribly hard.
I've read and heard quite a bit about the benefits of heart rate training, so I'm going to stick
with it for a while, but I'd like to hear some thoughts on this.
Peter