Re: Exercice to develop sense of center
The "weld" at the connection between the structure and the pole cannot give way.
When translating this model into human terms, the weld is our "force neutral" shoulder. If you use muscle to keep the shoulder from collapsing, it is not force neutral.
Relaxation of the shoulder is also key. Here is a mental image that has worked for me.
If I am standing erect and pretend I am holding two 80 pound dumbbells, my shoulder site back and low in their sockets. Any forward positioning in the socket is muscle tension and interferes with "force neutral."