[QUOTE=lstevenson;4250762]
What proves your theory wrong is that when you “work” on the neck to rid it of the tension, the tension often remains in the back. But every time you work on the back to relieve the tension there, the whole body becomes relaxed.[/QUOTE]
I wonder if we are speaking of two different things? I dont think you resolve stiffness by working the neck alone. I also dont think you resolve stiffness or tension by working the back alone. You relieve tension or stiffness by riding the whole horse. And absolutely you are right that the long back muscles must be relaxed for the horse to be truly through. Its easy to fake collection by rounding the front by force.
Basically, there is no such things are segmentation in the topline muscles. They all attach and merge with each other to create a continuum from poll to tail so that what happens in the gluts as an impact in the poll. Its really one long channel. And I agree that when a horse is locked in his back, unlocking it will create dramatic improvement in the front and back end - and usually, visible gait amelioration.
What I am saying pertains to actual physical problems that can be located in the neck, sacrum, ribcage, etc… and would create a situation that would not be “fixable” by working on suppling the back alone. Though helping these problems would have an impact on the back and the whole body. I have for example worked on a horse that had a neck like concrete, he could not reach out to get a sugar litterally because of how he was ridden in the bridle. He needed neck muscle therapy and reeducation - handson/under saddle- to loosen the neck muscles and by extension the long back muscles.
To help rid a horse of tension in my opinion you need proper spinal alignment, relaxation of the topline, and the right tempo for that particular horse. To help with stiffness, you ride the whole body on bended lines (I gave examples), use baby shoulder fore, shoulder in, 1/4, 1/2 walk pirrouettes in show tempo when applicable, etc…
I agree with you that there are many ways to work the neck of the horse alone, or to demand more hindleg under that does nothing to allow throughness - a soft, elastic back that conducts the connectivity from back to front smoothly without blockage - and damage the back, creating more and more stiffness and restriction.