A.M. 20 miles with Mike. The first 4 were with the kids. Benjamin ran 3, Jenny and Julia ran 2, Joseph ran 1, and Jacob did 0.5. Mike and I did a workout on the trail practicing 5:20 pace. 2000 in 6:35, than one went well, I felt strong. Then we jogged 400, and started another. Mike was leading, but too slow, so we went through the 400 in 82, then I took over and Mike fell back, which surprised me. I went on to battle the leaves on the trail and finished it out in 6:47, probably an honest 6:40 effort if you adjust for the leaves on that section. Something was wrong with Mike, 7:20 was all he could do. So we jogged some, and then did 1000. I wanted to see what was wrong with Mike. He handled that one well, we did 3:17. That was encouraging, and rather odd as well. What was the cause of that 7:20 deal earlier? To get an idea we did 5:20 pace to Mike's failure but not exceeding 2000. He made it to 600 or so then started falling back, I ran to 1200 in 3:59, he did 4:09. This was probably low glycogen for him. When glycogen runs low, the body begins to conserve and the ability to sustain high power output is reduced, although 2-3 minute bursts of power are possible.
At the end we did 1.5 at 5:50 pace, and Mike handled it fine.