I love this idea! Tie it into your existing routine! I decided a year ago to stand on one leg while brushing my teeth. Started as a teeter-totter, now I just sway a bit. I change legs when I change quadrants & do each for 30 seconds.
Also, squares are great. I avoided them (and lunges) for 20+ years because of my knee. Then I worked with a trainer for about 8 months last year. She slowly got me working the knee and after a few months I realized I could do squats! My pampering the knee for decades did nothing for it while her slow but steady working on it has me pain free and able to hike for 5+ hours now.
I also found the book: Built from Broken: A Science-Based Guide to Healing Painful Joints, Preventing Injuries, and Rebuilding Your Body by Scott Hogan
Really helped me out.
Oof! It’s squats, not squares. That’s what I get for not proof reading my posts.