When my leg tremors are a real nuisance, I lodge my toes under the front edge of the couch and do sit ups using my legs to pull me up. Knees bent. It's like a leg oriented sit up. It calms my legs for anywhere from a minute to actually causing meds to kick in. I think it is the cause of the tremor being redirected to a structured effort. It goes back to the old relaxation exercises where you tense the muscles and then relax them. My calves are in pretty good shape.