Ran with Ted in the morning. Some variation today - did a 2.5 mile tempo on the way back in 14:40, then came back to Ted. Total 10.24 in 1:09:17. Enough snow and ice on the road to make it annoying, but not enough to make it really slow.
Ran with the kids in the evening. Lots of snow by then.
Went to see Dr. Jex. My lower back curve in the neutral position standing up was 27 degrees. This almost withing the normal range, which is 35-45 degrees. However, no noticable improvements in running. Two possibilities - either the postural improvements do not carry (at least right away) from static position to dynamic (running), or the shape of the lower back is not a significant factor in the running economy. I sure hope it is the former, otherwise I'm back to square one on the whole running ecomony improvement project.
It does make sense to me that having a proper curve in the lower back should give you some extra spring on take-off. Then you can run like a kangooroo, effortlessly bouncing like a ball.
Next step is to figure out some exercises to develop a proper dynamic curve in the spine as opposed to static. That is something the Pettibon method does not have, or at least I have not seen it in the instructions and excerises.