"The Relaxed Wife" is yet another gem from the Prelinger Archives. A commercial for Pfizer's new line of "Ataraxic" drugs in the 1950's, the movie shows how a wife teaches her husband how to relax. This guy is a total bag of nerves, his facial contortions alone are worth watching it. Oddly enough, he learns to relax without the drug. Hell, I learned to relax from this thing. Also, note the double beds that were standard in the olden days.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.