A.M. Ran with Jeff. Easy 8 with one fast mile. Jeff wanted to do it in 5:20, and he managed to hold the pace for 100 meters. After that it was 5:00 pace. We ended up with 5:03.4. HR got up only to 165. This makes me wonder about the standard max HR testing protocol of running 0.75 at 5 K race pace, and then the last 400 all out. Better, 2.5 at 10 K race pace, then the last 800 all out. Perhaps the more you are developed aerobically, the longer you need to go before you go all out, and the longer you need to go all out for.
The mile felt good, I was happy about that. A bit of a burn in the legs, but I could deal with it. I think with some training I can learn to run through it. That's how I ran 15:37 5 K in Draper Days in 2004. What is interesting is that last August/September I could never get that burn, something else would fail before I could get to it. Which confirms my suspicion that the burn is a mere consequence of running fast, it does not stop you in and of itself. Something else stops you, and at times it can stop you before you reach the burn.
Then added 2 with Benjamin. We tried 6:00 pace to failure, but he was not feeling good and made it only to the quarter in 91. Total time for 2 miles was 18:00.
P.M. 2 with Jenny in 18:31. Julia ran 1.5 with us in 14:36.