I have had a LOT of Alexander Training as it happens, Bagger. Two 13 week courses and 2 weekend seminar brush-ups.
The Alexander Technique was developed by a Tasmanian non-devil
as a system to teach relaxation and body tension awareness to actors. It takes a couple years of intense study to get accredited as a trainer-- and once you have the certificate that is usually enough in most states to also be a licensed physical therapist. I took courses not to become a trainer, but because I took a lot of theatre training.
For a person with the right temperament, it is an excellent training. Reduced to it's most simplistic level, Alexander Technique is all about
: hey, my foot's starting to fall asleep, I'd better move it. Awareness of tension, release of tension. The kind of tension actors deal with is commonly called stage freight....
I'll get back later with more, but I have to go now.
Alexander Technique, like many other techniques, is quite ethical and useful and based on sound primiciples.