More tapering for Magna. Jogged two Slate Canyon loops with Eric, then did some tune-up speed. Did a couple of accelerations at 5 K pace to accomodate for the "bio break". First, measured anaerobic threshold by feel. Hit the control 0.5 in 2:42.5, and it felt very very good. I do not recall 5:25 pace feeling that good on that section ever before. Then did a probe for a 5 K pace on the same stretch. 0.5 in 2:32.6, and it felt aggressive - I had to concentrate hard to make it happen. Now this could explain why it is so hard for me to push the 5 K pace - anaerobic threshold is so close, and so inviting, like a soft warm bed at the end of a hard day. What is the solution? Probably not to worry about it, and just keep doing what brings the threshold up. I do not mind developing Alberto Salazar syndrome at all - 57 seconds on a quarter, 4:01 mile, and 13:20 5 K. A slowdown of only 7 seconds per quarter from 400 m sprint to 5 K pace. If I did that, I'd be running my 5 K in 13:51.
I do not really need a true 5 K speed development, I am just concerned that the lack of 5 K speed creates a barrier for the threshold. The question is how to avoid this being a barrier, and it is an open question right now.
Ran a mile with ankle weights. Later in the morning ran with Benjamin and Jennifer. Jogged a mile with Joseph and Julia in the stroller in the evening.
Salt Lake Marathon has put its half-marathon and 5 K back on the circuit. I definitely do not need another marathon at this point, especially in hot conditions. I figured I did not want to run the half either for a number of reasons. However, 5 K sounds good - gives me some 5 K practice, plus hopefully good circuit points with everybody now spread around among three races. So I decided to do it. The Salt Lake Marathon web site says: Not ready to run a marathon? Then get involved in the race by joining thousands of other runners and walkers in the 5K!. Well, that will officially be my reason...