Yesterday morning's run was my second 80% Effort Fitness Run. I've got
one of these scheduled every 3 weeks for a while to try and measure my
aerobic progress.

Here are the results:

Lap - Time at Effort (comment)
w/u - 9:30 at 129 55%PE (a little stiff and uncomfortable)
01 - 4:19 (7:26) at 76%PE
02 - 4:22 (7:06) at 81%PE
03 - 4:23 (7:18) at 84%PE
04 - 4:18 (7:18) at 79%PE
05 - 4:18 (7:35) at 84%PE
06 - 4:21 (7:40) at 82%PE
07 - 3:58 (8:02) at 84%PE (0:18 from completing my 7th full lap)
c/d - 9:38 (9:20) at 71%PE

Much more consistent time- and effort-wise than the first one.
However, I went a pinch too hard--I had in my head the wrong target HR.
Even so, I still felt much more comfortable with the effort this time
but my form continued to find its groove.

Botton line ~ I don't know the exact distance but I did make it a ~.1
mi further than last time. I was 0:18 shy of completing 7 x .6 mi
loops.

Keep running (and monitoring your progress)...
- BK.