Brian and Keir,
Funny you guys should both suggest running tall. I've noticed over the past year that I'll have times where I just feel great on the run...and I quickly figure out that I am 1) running tall and 2) taking smaller, steps. I think the past year of hadding has led to a more efficient stride. Even when I was doing the 80% runs, that's how my form was starting to work. As a former sprinter, I just love to take big strides and eat up the track. Not necessarily a good thing now that I'm a distance only guy.
Had a good run yesterday Brian, thanks for asking. There is a guy at work who asked if he could tag along with me on a run a few weeks ago. He's a bit slower than me and we ran so both of us could talk (well, he was puffing a bit, but still talking). ANyway, he runs probably 30-40 sec/mile slower. We've now adoted going for 2 runs during the work week. It's great for me as I talk the whole way an my ave HR is at 70% and below. A built-in regulator! ALso, I had forgotten how nice it is to run with someone. For the past 4 years I have done every run, minus my races, solo.
Buried a friend today so no run; will devote a nice one to him over the weekend.