I told a neighbor that my lower back gets tired when walking and I have to stop and sit down.  He suggested the Maxar belt, which his wife, who is a nurse, suggested for him.  It is great.  I can walk a mile without sitting down.  I used to take it with me when I'd bike, and put it on when I got to the hiking trail, but I found I can wear it on my bike with no problem.  I used hiking poles before, and still do.