There was a high school lacrosse game going on at Kezar, so the track was closed, but people were running on the upper level, above the stands. The path was paved, but I'm not the one afraid of pavement. So, I decided to do the
I intervals on the paved track. It looked about 1.5 times longer than the real track, and also had about 3 m climb per lap. I did 4×(2 laps at
I + ½ lap rest).
This (Friday) morning, I measured the paved track in Google. The quality of
the photo was so good that I could easily discern the stripe of different color asphalt that I generally followed, about 30 cm wide. I then calibrated the measurement by
tracing the real 400 m track in the same Google photo. The length of the upper track is 636 m. My feeling during the run was that it was about 650 m, maybe just a tad shorter, so the tad turned out to be quite a bit. I certainly have slowed down considerably since the last set of intervals.
My times were 4:35, 4:40, 4:41, 4:43, which, on average, scales to 3:40/km (but 3:35/km if the climb is taken into account with the standard AP factor). The transmitter battery died shortly into this workout. The average HR number is highly suspect. The max HR is sort of a reasonable guess, too; there were higher readings.
The lacrosse game seemed quite curious... it seemed that one team was much, much better than the other, so the score was like 20–2.