Try out some urban boots or even just a casual “dress” shoe. In my experience, having the hard, lifted heel makes all the difference in the world to your back and other things. It made my knees better, my feet don’t hurt, and I don’t deal with daily back pain anymore. I have tennis shoes/sneakers/etc at home but the are only for exercise. For walking around, going to work, etc., it’s always a pair of boots.