Thanks for that. Useful, and it says what I'm doing is mostly right. I'll do the chair test, and I suspect I will do well at it. I need to increase my stairs climbing speed and to do squats. I'm still good at climbing stairs. Yesterday, I climbed 28 flights, and I always climb two steps at a time.

There is more work to do. I can't get up from the floor without using my arms or knees, and I want to regain that ability.

Speaking of falling, I practice falling every year. Maybe I should do it more frequently. I do a "stage fall" from ankles to knee to hip to elbow to shoulder. I do it from standing, onto a soft ground. I find that doing this helps prepare me for when I fall off my bike. It works well.