Quite a few years ago now I developed what I presume is restless leg syndrome. (I never sought treatment for it.) Over time that rls feeling spread throughout my body. Plus, as I've aged, my level of generalized anxiety has increased as well. And, between the two, I find sitting still to be a challenge. I can do it by focusing on what I'm feeling & simply being with it in a mindful manner. But it definitely is a challenge.