legend-

I thought I would also recomend a book here, I have read a few books on alexander technique and also completing 30 lessons!! the reason I studied alexander technique through playing guitar for long hours I would be in pain after long sessions with the guitar anyway.

The technique also gets you put of Habitual pattern, Like responding to certain nosies in return you miss use your body!

The book explains far better than I could.

'the alexander technique' a skill for life by Pedro de Alcantara.