Notes
That's right, I did 45 intervals today :) This was part of a test I found on the low hr group to determine your true MAF. It was pretty cool. I started at 5.5 mph and every 10 seconds I bumped it up .1 mph til I hit 10. You can see the graph and thread here:
http://www.runningahead.com/groups/LOWHRTR/forum/74576bae14be4935acb9439bcfb86293/2
It's pretty clear that my MAF is in the 143 - 145 range which is right where I was for my easy running. I'm counting this as a light interval since I did a few minutes of faster running at the end of the test and my HR reached 175.