Runners say “everyone can run”. That’s nonsense. Running is high impact no matter what shoes you waste money on, no matter what surfaces you run on, no matter how fast or how slow, or how often. Some people can do it, some cannot.
I walk. Every day, inside or out, for at least a half an hour. Sometimes a stroll, sometimes a charge, but always a walk. I also do pushups and pullups: again. sometimes a few, sometimes a lot. I mix in other things like jumping, planks, and whatever.
I’m 72. I’m 160 lbs, fit and healthy, but I was not always so.