1. The lumbar spine should have good mobility... "What did he just say?!"
2. The mobility/stability continuum is a good generalization and I really wish it was that simple, but it's not.
3. The thoracic spine: anatomical architecture limits it's mobility compared to the lumbar spine. T1 through T7 are "locked" into the ribcage, limiting their mobility. T8, 9, and 10 are attached to "false" ribs, increasing their mobility, and T11 and 12 are attached to "floating" ribs, giving them the greatest mobility of the thoracic spine. Plus the further up you go on the thoracic spine, there is a decrease in disc height, when compared to lower vertebrae, again decreasing some range of motion.
4. Is lumbar flexion always bad?
5. Many folks could probably use some good mobility work at the lumbar spine. "Has this guy fallen off his rocker!"
6. Little kids don't breath through their chest and shoulders. SERIOUSLY stop and think about that for a moment...
7. Irradiation works the other way as well. Hence why "stability" work may not... well... work.
8. Dr. Eric Cobb said something this weekend (Z-Health R-phase) that really made me think. "The best in the world are really the best at slowing down." He wasn't talking about deceleration.
9. We also had a good discussion at Z-Health regarding feet. The feet don't necessarily need a "good" arch, they just need to be able to move (mobility).
10. The stretch-shortening cycle (SSC) needs to be trained. Yes it is a reflex, and "just" happens, but it needs to be trained.
11. Specificity. It is a principle, not "just" a method.
12. Boston in 7. KG has earned it.