I found that my yoga was probably preventing the onset of RSI. It wasn’t until I was unable to go to classes one term, so wasn’t doing any regular stretching exercises that I started to get problems. A good teacher will be able to adapt positions to help you, and certainly shouldn’t get you doing anything which will make you worse. The problem comes when people try to practice at home, without understanding quite what they are doing to themselves.
Comment: Thanks. Cat, Cobra, Dog (hands/arms) postures all seem to be bad for me. You’re right, home yoga can lead to problems, but that is one of the reasons I liked it. You could do it any time, and all you need is a mat.