Listen to me just hear me out, if I could have your attention just quieten down for a voice in the crowd. I get so confused I don't understand I know you feel the same way you've always wanted to say but you don't get the chance, just a voice in the crowd.
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.