I ditched my chair and use an inflatable ball. I bought the 20€ max size at a sports store (Decathlon, France). It is wonderful, I did not have any adaptation

I ditched my chair and use an inflatable ball. I bought the 20€ max size at a sports store (Decathlon, France). It is wonderful, I did not have any adaptation time and it firces me to make micro (or macro) movements while I sit. I also bounce on it, lay flat and twist my spine. I really recommend to try.