From the beginning, I enjoyed exploring therapeutic trembling in different positions. They each allow different things to happen.
When I sit, it frees my upper body to move, tremble, and shake. (Often the shoulders.)
When I lie down, it frees up my legs and pelvis to shake. This can also move up the body.
And when I stand free from a wall, the movements move unhindered through my whole body and especially vertically.
I should mention that when I say “therapeutic trembling” it’s, in my case, in the context of Tension and Trauma Releasing Exercises (TRE). That’s how I learned it and what I still use to guide the process.