A.M. Wanted to get a better understanding of the fading on Wednesday, so did the same workout at the start of the long run after the last 3 days of more eating and somewhat better sleep. A MySQL upgrade job for a client last night did not help with sleep, but there was really no better time to do it as we had to avoid disruptions during peek hours, but it was not too bad, I still got over 7 hours of sleep.
This time the 3 mile tempo run went better, although still with problems. Splits but quarter: 79 - 80 - 80 - 81 (5:20) - 79 - 81 - 86 - 82 (5:28) - 85 - 84 - 84 - 84 (5:37) - total time 16:25. Mike pulled away from me in the last quarter and finished in 16:22.
Then we jogged for about 7 miles, during which time we caught up to Kirk and he gave us a lesson on Arabic culture. He teaches Arabic at BYU. Then we did a 5 mile tempo. The target was 6:00 pace, but we picked it up after 2 K mark, and ended up almost a minute ahead of pace with 29:09. The splits were 6:02 - 5:48 - 5:50 - 5:50 - 5:39. Last two quarters were 85 and 79.
Here is what's interesting. The last half mile of the 5 mile tempo (from 12 to 17, so you would expect lower glycogen) run over the exact same stretch as the 3 mile tempo was 5 seconds faster than the last half mile of the three mile tempo which was done from 2 to 5, so essentially primed for racing a 5 K. It also felt easier. The difference, of course, was that I had not run 1.5 miles shortly prior at 5:20 pace, but what I find surprising is that was enough to negate the difference you would expect from not being in the out-of-fuel zone.
So one thing is clear at this point. 5:20 pace temporarily puts me in a state of misery more that it should. The mechanism of that is debatable. If VO2 max tests I've done in the past are any indication, the lactic acid levels would be quite low at that effort - maybe 1.02 RER (respiratory exchange ratio), which is a good way to estimate lactic acid buildup without stopping to poke yourself, in other words not a whole lot. There is some unknown villain at work. If somebody with a lab wants to track him down, I'll be happy to participate.
The antidote to the villain, however, is to do intervals that are longer than a mile, or possibly shorter ones with very little rest at 5:20 pace. I'll give that a try.
My Crocs are over 1000 miles, and still no holes, although one is about to develop.