I've been doing tai chi for over thirty years. Now I can't balance on one foot for certain postures and I do the ones that work for me.

I know that there are seated forms of both Tai Chi and Qigong where you can generate the Qi that is healing while sitting in a chair. I prefer a chair without arms and one where you can put your feet flat on the ground or floor. Also check Youtube for both seated examples. Again I would look for Lee Holden for Qigong. Very helpful! As you heal, you can try standing and see how it goes.