If you think you have sciatica, it could be due to your piriformis muscle being too tight hence irritating your sciatic nerve. This piriformis stretch in video http://youtu.be/2qZ517Rw7ME is the best I've seen so far because you can control the degree of stretch very well. I do this with my students in my Posture & Alignment class.

Edited by colman fink (02/17/13 01:34 AM)
Yuishinkai Kobujutsu USA - http://www.yuishinkai.info
Martial Arts with Colman - http://www.martialartswithcolman.com