Going in for a shot to the back

Yeah, core " muscles " are pretty sad at this point. I need to get after that, in a 73 year old fashion. Been almost a year of back problems and I know I have to get on this. Tomorrow I'll take a 10 minute walk and try out the new sneakers. Hoping to see some kind of improvement, but if not, I'll give it time. Had cortisone shot in my knee over a year ago and it kicked in immediately and still holding out.