I have created a free chair yoga printable PDF and a demo video is available on my Youtube channel!
You can download the PDF here: http://mariannejeffrey.yolasite.com/Curvy-Fitness-Enthusiast.php
Most poses are performed in a seated position and a few optional ones use the back of the chair for stability.
This is a great way to work a little exercise into your sewing day or even at work if you have a desk job.