I have been using buggies at the grocery store as a walker to help support spine, knees and hips walking on concrete for years. In past five months went to grocery store right after breaking foot and before catching covid a couple of times and parked truck in fire lane at door then used an electric cart to get what needed. That said not been back to grocery store now in four months but hope a couple more weeks and will be back out if take it easy. Just need to be able to go in two or three days a week and keep part timers on task.I am 74 so I make sure that everything I do is calculated with tools, to save steps. I can grind out rowing machine hours now....hardest thing now is walking out to place targets...knees.
At the market, use a cart as a walker or use the elec cart. I did for a while....first trip walking around the store in May, with a standard cart and not being out of breath was amazing!! The feeling of taking a deep breath and having the great/happy feeling that you only get with deep breath, is just golden!