I've sometimes thought about the health aspects of a desk where I stood, rather than sat, but never acted on it. Once more those thoughts came up. This time I decided I had materials on hand that would allow me to do a test. Boxes of books got the monitor and keyboard up to standing height, and a multi level in-out basket got the mouse up. I was good to go.
After a couple of days of use, my back was normal enough to resume sitting, and I had learned a couple of things about using a standing desk.
1. You need more than just the monitor, keyboard, etc. raised. I found that I also required a working surface at that height. So in a real installation, the footprint would have to include a large hard surface suitable for writing, placing books, documents, a light and so on.