Dani and I both concluded, at about the same time, that our office chairs were past their use-by dates. We both also want to test a chair, not just order blind, so we headed off to a well-stocked office-supply store and found replacements. (As it turned out, we both liked the same model.)

While we were there I asked if they had any kneeling chairs, because I'd like to try varying my posture. I had one of those 30+ years ago that I liked (at work), but also encountered several I didn't like, so I definitely want to try first. (Also, I don't know if it's compatible with the arthritis that is starting to form in one knee.) Alas, the sales rep said, that business has moved entirely online, so I gave up on that.

I had a height-adjustable (sit or stand) desk at my last job, back before Covid. Replacing my current desk would be a pain (as well as expensive), but after we got the chairs I started looking at "adapters", an adjustable thing you can put on your desk to raise a platform rather than the whole desk. Many of them make strong (maybe even binding) assumptions about monitor placement that do not work with my vision, but eventually I found a "just raise this (basically) rectangle and don't do anything else" model with metal, not plastic, core parts.

With nothing on it the platform lifts easily (there's a control on one side). With a monitor that is well below the rated weight limit, the first few inches of lifting are a fair bit of work, and then it goes fine. Lowering is easy. I switch back and forth once or twice a day, so that initial push is ok; if I were working full-time and wanting to change it up every hour or so, it might be more annoying.

I thought of half of a second-order effect. With this setup, even with the desk lowered the platform is about three inches higher than the desk surface. That's ok, I said; I'll just raise the chair. I rejected similar products that added more "resting" height; I did think about this. The part I didn't think about is that I'm short, so that change to chair height makes the difference between my feet reaching the floor and not. So now I am experimenting with footrests, courtesy of a friend, one of which is visible in the photo. I think this is the style I want, particularly if I can get a wedge of foam to stick in there to hold the "V" shape.

It all goes to show that you can't change just one thing. So far, though, I think this is working out.