Try this:  look back and up over your shoulder, into the farthest corner of the sky you can see, or deep into that back high diagonal corner of your study.  Then look back, up and over the other shoulder.  Feel how that movement swirls the spine, takes you upward, outward into a different point of view.  Don’t strain, don’t stretch  Just invite your eyes, heart, mind, bones, fascia to spin up/back out.  Taste that.