Hey Charlie,
I like standing the best for maximum effectiveness. Is the pain centrally located? Sciatic perhaps? How old are you? It's best to do as much as you can, even in inperfection, whatever imperfection means here. I'm a tad older, in pretty good health and need to stretch at least 10 minutes before starting. Kind-of-like a mini workout so to speak. However, if I do get a little cramping after beginning, I do visualize energy to the concerned area for relief and this hasn't failed me yet. So, keep on keeping on!
flipstick